diff --git a/.bruno/Correspondence/Initialize and Upload.bru b/.bruno/Correspondence/Initialize and Upload.bru
index 9bb2e349c..fda67fa71 100644
--- a/.bruno/Correspondence/Initialize and Upload.bru	
+++ b/.bruno/Correspondence/Initialize and Upload.bru	
@@ -28,7 +28,6 @@ body:multipart-form {
           "attachments": []
         },
         "RequestedPublishTime": "2024-09-28T12:44:28.290518+00:00",
-        "allowSystemDeleteAfter": "2025-08-29T13:31:28.290518+00:00",
         "dueDateTime": "2025-05-29T13:31:28.290518+00:00",
         "externalReferences": [
           {
diff --git a/.bruno/Correspondence/Initialize and upload (form-data).bru b/.bruno/Correspondence/Initialize and upload (form-data).bru
index e45369524..81e52465b 100644
--- a/.bruno/Correspondence/Initialize and upload (form-data).bru	
+++ b/.bruno/Correspondence/Initialize and upload (form-data).bru	
@@ -22,7 +22,6 @@ body:multipart-form {
   correspondence.content.messagesummary: Ett sammendrag for meldingen
   correspondence.content.messagebody: Som kan være plain text eller **markdown**
   correspondence.requestedpublishtime: {{requestedPublishTime}}
-  correspondence.allowsystemdeleteafter: {{allowSystemDeleteAfter}}
   correspondence.duedatetime: {{dueDateTime}}
   correspondence.propertylist.casenumber: 123
   correspondence.propertylist.etc: can-use-for-anything
diff --git a/.bruno/Correspondence/Initialize.bru b/.bruno/Correspondence/Initialize.bru
index 94c3831a5..565dde663 100644
--- a/.bruno/Correspondence/Initialize.bru
+++ b/.bruno/Correspondence/Initialize.bru
@@ -28,7 +28,6 @@ body:json {
       },
       "requestedPublishTime": "{{requestedPublishTime}}",
       "dueDateTime": "{{dueDateTime}}",
-      "allowSystemDeleteAfter": "{{allowSystemDeleteAfter}}",
       "externalReferences": [],
       "propertyList": {
         "caseNumber": "123",
diff --git a/Test/Altinn.Correspondence.LoadTests/data/correspondence-form.js b/Test/Altinn.Correspondence.LoadTests/data/correspondence-form.js
index e85082499..ffbc989e0 100644
--- a/Test/Altinn.Correspondence.LoadTests/data/correspondence-form.js
+++ b/Test/Altinn.Correspondence.LoadTests/data/correspondence-form.js
@@ -44,7 +44,6 @@ export function getCorrespondenceForm(resource_id, sender, recipient, boundary)
     addFormField('Correspondence.content.attachments[0].FileName', 'testfile.txt');
     addFormField('Correspondence.content.attachments[0].IsEncrypted', 'true');
     addFormField('Correspondence.visibleFrom', visibleFrom.toISOString());
-    addFormField('Correspondence.allowSystemDeleteAfter', deleteAfter.toISOString());
     addFormField('Correspondence.dueDateTime', dueDateTime.toISOString());
     addFormField('Correspondence.content.externalReferences[0].referenceValue', 'test');
     addFormField('Correspondence.content.externalReferences[0].referenceType', 'AltinnBrokerFileTransfer');
diff --git a/Test/Altinn.Correspondence.LoadTests/data/correspondence-json.js b/Test/Altinn.Correspondence.LoadTests/data/correspondence-json.js
index 955b634de..3a380d8e2 100644
--- a/Test/Altinn.Correspondence.LoadTests/data/correspondence-json.js
+++ b/Test/Altinn.Correspondence.LoadTests/data/correspondence-json.js
@@ -3,8 +3,6 @@ export function getCorrespondenceJson(resource_id, sender, recipient) {
     const visibleFrom = new Date(now);
     const dueDateTime = new Date(now.getTime());
     dueDateTime.setMonth(dueDateTime.getMonth() + 1);
-    const deleteAfter = new Date(now.getTime());
-    deleteAfter.setMonth(deleteAfter.getMonth() + 5);
     const data_without_attachment = {
         Correspondence: {
             resourceId: resource_id,
@@ -18,7 +16,6 @@ export function getCorrespondenceJson(resource_id, sender, recipient) {
                 attachments: [],
             },
             visibleFrom: visibleFrom.toISOString(),
-            allowSystemDeleteAfter: deleteAfter.toISOString(),
             dueDateTime: dueDateTime.toISOString(),
             externalReferences: [],
             propertyList: {},
diff --git a/Test/Altinn.Correspondence.LoadTests/test_initialize_and_upload_correspondence.js b/Test/Altinn.Correspondence.LoadTests/test_initialize_and_upload_correspondence.js
index c2c7be923..3f0cfb4da 100644
--- a/Test/Altinn.Correspondence.LoadTests/test_initialize_and_upload_correspondence.js
+++ b/Test/Altinn.Correspondence.LoadTests/test_initialize_and_upload_correspondence.js
@@ -41,7 +41,6 @@ formData.append('Correspondence.content.attachments[0].SendersReference', "1234"
 formData.append('Correspondence.content.attachments[0].FileName', "testfile.txt");
 formData.append('Correspondence.content.attachments[0].IsEncrypted', "true");
 formData.append('Correspondence.visibleFrom', "2024-05-29T13:31:28.290518+00:00");
-formData.append('Correspondence.allowSystemDeleteAfter', "2025-05-29T13:31:28.290518+00:00");
 formData.append('Correspondence.dueDateTime', "2025-05-29T13:31:28.290518+00:00");
 formData.append('Correspondence.content.externalReferences[0].referenceValue', "test");
 formData.append('Correspondence.content.externalReferences[0].referenceType', "AltinnBrokerFileTransfer");
diff --git a/Test/Altinn.Correspondence.LoadTests/test_initialize_correspondence.js b/Test/Altinn.Correspondence.LoadTests/test_initialize_correspondence.js
index c292df20a..fa80600d2 100644
--- a/Test/Altinn.Correspondence.LoadTests/test_initialize_correspondence.js
+++ b/Test/Altinn.Correspondence.LoadTests/test_initialize_correspondence.js
@@ -32,7 +32,6 @@ const data_without_attachment = {
             attachments: [],
         },
         visibleFrom: "2024-09-28T12:44:28.290518+00:00",
-        allowSystemDeleteAfter: "2025-08-29T13:31:28.290518+00:00",
         dueDateTime: "2025-05-29T13:31:28.290518+00:00",
         externalReferences: [],
         propertyList: {},
diff --git a/Test/Altinn.Correspondence.Tests/Factories/CorrespondenceBuilder.cs b/Test/Altinn.Correspondence.Tests/Factories/CorrespondenceBuilder.cs
index 36c530859..9b60b5191 100644
--- a/Test/Altinn.Correspondence.Tests/Factories/CorrespondenceBuilder.cs
+++ b/Test/Altinn.Correspondence.Tests/Factories/CorrespondenceBuilder.cs
@@ -180,11 +180,6 @@ public CorrespondenceBuilder WithRequestedPublishTime(DateTimeOffset? requestedP
             _correspondence.Correspondence.RequestedPublishTime = requestedPublishTime;
             return this;
         }
-        public CorrespondenceBuilder WithAllowSystemDeleteAfter(DateTimeOffset dueDateTime)
-        {
-            _correspondence.Correspondence.AllowSystemDeleteAfter = dueDateTime;
-            return this;
-        }
         public CorrespondenceBuilder WithConfirmationNeeded(bool confirmationNeeded)
         {
             _correspondence.Correspondence.IsConfirmationNeeded = confirmationNeeded;
diff --git a/Test/Altinn.Correspondence.Tests/Factories/CorrespondenceEntityBuilder.cs b/Test/Altinn.Correspondence.Tests/Factories/CorrespondenceEntityBuilder.cs
index a5d9cfadd..6765160e4 100644
--- a/Test/Altinn.Correspondence.Tests/Factories/CorrespondenceEntityBuilder.cs
+++ b/Test/Altinn.Correspondence.Tests/Factories/CorrespondenceEntityBuilder.cs
@@ -216,12 +216,6 @@ public CorrespondenceEntityBuilder WithServiceOwnerId(string serviceOwnerId)
             return this;
         }
 
-        public CorrespondenceEntityBuilder WithAllowSystemDeleteAfter(DateTimeOffset? allowSystemDeleteAfter)
-        {
-            _correspondenceEntity.AllowSystemDeleteAfter = allowSystemDeleteAfter;
-            return this;
-        }
-
         public CorrespondenceEntityBuilder WithMessageSummary(string messageSummary)
         {
             if (_correspondenceEntity.Content != null)
diff --git a/Test/Altinn.Correspondence.Tests/Helpers/CorrespondenceHelper.cs b/Test/Altinn.Correspondence.Tests/Helpers/CorrespondenceHelper.cs
index 6ec5e6d87..80a3bfaa7 100644
--- a/Test/Altinn.Correspondence.Tests/Helpers/CorrespondenceHelper.cs
+++ b/Test/Altinn.Correspondence.Tests/Helpers/CorrespondenceHelper.cs
@@ -24,7 +24,6 @@ public static MultipartFormDataContent CorrespondenceToFormData(BaseCorresponden
             { new StringContent(correspondence.SendersReference), "correspondence.sendersReference" },
             { new StringContent(correspondence.RequestedPublishTime.ToString()), "correspondence.RequestedPublishTime" },
             { new StringContent(correspondence.DueDateTime.ToString()), "correspondence.dueDateTime" },
-            { new StringContent(correspondence.AllowSystemDeleteAfter.ToString()), "correspondence.AllowSystemDeleteAfter" },
             { new StringContent(correspondence.Content.MessageTitle), "correspondence.content.MessageTitle" },
             { new StringContent(correspondence.Content.MessageSummary), "correspondence.content.MessageSummary" },
             { new StringContent(correspondence.Content.MessageBody), "correspondence.content.MessageBody" },
diff --git a/Test/Altinn.Correspondence.Tests/TestingController/Correspondence/CorrespondenceInitializationTests.cs b/Test/Altinn.Correspondence.Tests/TestingController/Correspondence/CorrespondenceInitializationTests.cs
index 1fe19750a..589ea5e3a 100644
--- a/Test/Altinn.Correspondence.Tests/TestingController/Correspondence/CorrespondenceInitializationTests.cs
+++ b/Test/Altinn.Correspondence.Tests/TestingController/Correspondence/CorrespondenceInitializationTests.cs
@@ -427,58 +427,6 @@ public async Task InitializeCorrespondence_DueDate_PriorRequestedPublishTime_Ret
             Assert.Equal(HttpStatusCode.BadRequest, initializeCorrespondenceResponse.StatusCode);
         }
 
-        [Fact]
-        public async Task InitializeCorrespondence_AllowSystemDeleteAfter_PriorToday_Returns_BadRequest()
-        {
-            // Arrange
-            var payload = new CorrespondenceBuilder()
-                .CreateCorrespondence()
-                .WithAllowSystemDeleteAfter(DateTimeOffset.UtcNow.AddDays(-7))
-                .Build();
-
-            // Act
-            var initializeCorrespondenceResponse = await _senderClient.PostAsJsonAsync("correspondence/api/v1/correspondence", payload);
-
-            // Assert
-            Assert.Equal(HttpStatusCode.BadRequest, initializeCorrespondenceResponse.StatusCode);
-        }
-
-        [Fact]
-        public async Task InitializeCorrespondence_AllowSystemDeleteAfter_PriorRequestedPublishTime_Returns_BadRequest()
-        {
-            // Arrange
-            var payload = new CorrespondenceBuilder()
-                .CreateCorrespondence()
-                .WithAllowSystemDeleteAfter(DateTimeOffset.UtcNow.AddDays(7))
-                .WithRequestedPublishTime(DateTimeOffset.UtcNow.AddDays(14))
-                .WithDueDateTime(DateTimeOffset.UtcNow.AddDays(21)) // ensure DueDate is after RequestedPublishTime
-                .Build();
-
-            // Act
-            var initializeCorrespondenceResponse = await _senderClient.PostAsJsonAsync("correspondence/api/v1/correspondence", payload);
-
-            // Assert
-            Assert.Equal(HttpStatusCode.BadRequest, initializeCorrespondenceResponse.StatusCode);
-        }
-
-        [Fact]
-        public async Task InitializeCorrespondence_AllowSystemDeleteAfter_PriorDueDate_Returns_BadRequest()
-        {
-            // Arrange
-            var payload = new CorrespondenceBuilder()
-                .CreateCorrespondence()
-                .WithAllowSystemDeleteAfter(DateTimeOffset.UtcNow.AddDays(14))
-                .WithRequestedPublishTime(DateTimeOffset.UtcNow.AddDays(7))
-                .WithDueDateTime(DateTimeOffset.UtcNow.AddDays(21))
-                .Build();
-
-            // Act
-            var initializeCorrespondenceResponse = await _senderClient.PostAsJsonAsync("correspondence/api/v1/correspondence", payload);
-
-            // Assert
-            Assert.Equal(HttpStatusCode.BadRequest, initializeCorrespondenceResponse.StatusCode);
-        }
-
         [Fact]
         public async Task InitializeCorrespondence_WithConfirmationNeeded_Without_DueDate_Returns_BadRequest()
         {
diff --git a/Test/Altinn.Correspondence.Tests/TestingController/Migration/MigrationControllerTests.cs b/Test/Altinn.Correspondence.Tests/TestingController/Migration/MigrationControllerTests.cs
index 0368c5a14..1f0b01be9 100644
--- a/Test/Altinn.Correspondence.Tests/TestingController/Migration/MigrationControllerTests.cs
+++ b/Test/Altinn.Correspondence.Tests/TestingController/Migration/MigrationControllerTests.cs
@@ -295,7 +295,7 @@ public async Task MakeCorrespondenceAvailable_Defined()
             .WithStatusEvent(MigrateCorrespondenceStatusExt.Archived, new DateTime(2024, 1, 9, 10, 50, 17))
             .Build();
         SetNotificationHistory(migrateCorrespondenceExt);
-        string jsonCorr = "{\"correspondenceData\":{\"correspondence\":{\"resourceId\":\"skd-migratedcorrespondence-3476-130314\",\"sender\":\"urn:altinn:organization:identifier-no:974761076\",\"senderPartyUuid\":\"e6e80419-0019-4892-b8a7-78ac03eb3c51\",\"sendersReference\":\"b4199d2c-c063-4bb2-bce6-0b4d69f5acea\",\"messageSender\":\"Skatteetaten\",\"content\":{\"language\":\"nb\",\"messageTitle\":\"A03 a-melding tilbakemelding for 2025-05 - meldingsId: tlx-1232714052\",\"messageSummary\":\"\",\"messageBody\":\"Tilbakemelding på a-melding\"},\"requestedPublishTime\":\"2025-06-30T12:06:09.487+02:00\",\"allowSystemDeleteAfter\":null,\"dueDateTime\":null,\"externalReferences\":[],\"propertyList\":{\"Altinn2ArchiveUnitReference\":\"AR20699019\"},\"replyOptions\":[],\"ignoreReservation\":null,\"published\":\"2025-06-30T12:06:09.487+02:00\",\"isConfirmationNeeded\":false},\"recipients\":[\"urn:altinn:organization:identifier-no:313414450\"],\"recipientPartyUuids\":[\"aa0c3933-4d4e-4bbb-8ac6-1becd706ffe8\"],\"existingAttachments\":[]},\"altinn2CorrespondenceId\":30088189,\"eventHistory\":[{\"status\":0,\"statusText\":\"Correspondence Created in Altinn 2\",\"statusChanged\":\"2025-06-30T12:06:09.487+02:00\",\"eventUserUuid\":\"00000000-0000-0000-0000-000000000000\",\"eventUserPartyUuid\":\"00000000-0000-0000-0000-000000000000\"},{\"status\":2,\"statusText\":\"Correspondence Published in Altinn 2\",\"statusChanged\":\"2025-06-30T12:06:09.487+02:00\",\"eventUserUuid\":\"e6e80419-0019-4892-b8a7-78ac03eb3c51\",\"eventUserPartyUuid\":\"e6e80419-0019-4892-b8a7-78ac03eb3c51\"},{\"status\":4,\"statusText\":\"Migrated event Read from Altinn 2\",\"statusChanged\":\"2025-06-30T12:06:46.337+02:00\",\"eventUserUuid\":\"2a064dc8-193e-4ca0-9027-9aef49c96db1\",\"eventUserPartyUuid\":\"2a064dc8-193e-4ca0-9027-9aef49c96db1\"}],\"notificationHistory\":[],\"forwardingHistory\":[],\"IsMigrating\":true,\"created\":\"2025-06-30T12:06:09.487+02:00\",\"partyId\":51843981}";
+        string jsonCorr = "{\"correspondenceData\":{\"correspondence\":{\"resourceId\":\"skd-migratedcorrespondence-3476-130314\",\"sender\":\"urn:altinn:organization:identifier-no:974761076\",\"senderPartyUuid\":\"e6e80419-0019-4892-b8a7-78ac03eb3c51\",\"sendersReference\":\"b4199d2c-c063-4bb2-bce6-0b4d69f5acea\",\"messageSender\":\"Skatteetaten\",\"content\":{\"language\":\"nb\",\"messageTitle\":\"A03 a-melding tilbakemelding for 2025-05 - meldingsId: tlx-1232714052\",\"messageSummary\":\"\",\"messageBody\":\"Tilbakemelding på a-melding\"},\"requestedPublishTime\":\"2025-06-30T12:06:09.487+02:00\",\"dueDateTime\":null,\"externalReferences\":[],\"propertyList\":{\"Altinn2ArchiveUnitReference\":\"AR20699019\"},\"replyOptions\":[],\"ignoreReservation\":null,\"published\":\"2025-06-30T12:06:09.487+02:00\",\"isConfirmationNeeded\":false},\"recipients\":[\"urn:altinn:organization:identifier-no:313414450\"],\"recipientPartyUuids\":[\"aa0c3933-4d4e-4bbb-8ac6-1becd706ffe8\"],\"existingAttachments\":[]},\"altinn2CorrespondenceId\":30088189,\"eventHistory\":[{\"status\":0,\"statusText\":\"Correspondence Created in Altinn 2\",\"statusChanged\":\"2025-06-30T12:06:09.487+02:00\",\"eventUserUuid\":\"00000000-0000-0000-0000-000000000000\",\"eventUserPartyUuid\":\"00000000-0000-0000-0000-000000000000\"},{\"status\":2,\"statusText\":\"Correspondence Published in Altinn 2\",\"statusChanged\":\"2025-06-30T12:06:09.487+02:00\",\"eventUserUuid\":\"e6e80419-0019-4892-b8a7-78ac03eb3c51\",\"eventUserPartyUuid\":\"e6e80419-0019-4892-b8a7-78ac03eb3c51\"},{\"status\":4,\"statusText\":\"Migrated event Read from Altinn 2\",\"statusChanged\":\"2025-06-30T12:06:46.337+02:00\",\"eventUserUuid\":\"2a064dc8-193e-4ca0-9027-9aef49c96db1\",\"eventUserPartyUuid\":\"2a064dc8-193e-4ca0-9027-9aef49c96db1\"}],\"notificationHistory\":[],\"forwardingHistory\":[],\"IsMigrating\":true,\"created\":\"2025-06-30T12:06:09.487+02:00\",\"partyId\":51843981}";
 
         migrateCorrespondenceExt = JsonConvert.DeserializeObject<MigrateCorrespondenceExt>(jsonCorr);
         CorrespondenceMigrationStatusExt resultObj = await MigrateSingleCorrespondence_NoAdd(migrateCorrespondenceExt);
diff --git a/Test/Altinn.Correspondence.Tests/TestingHandler/CleanupPerishingDialogsHandlerTests.cs b/Test/Altinn.Correspondence.Tests/TestingHandler/CleanupPerishingDialogsHandlerTests.cs
index 0b1fdd4fa..560f956b3 100644
--- a/Test/Altinn.Correspondence.Tests/TestingHandler/CleanupPerishingDialogsHandlerTests.cs
+++ b/Test/Altinn.Correspondence.Tests/TestingHandler/CleanupPerishingDialogsHandlerTests.cs
@@ -21,13 +21,11 @@ public async Task ExecuteCleanupInBackground_RemovesExpiresAtAndCountsAlreadyOk(
             .WithCreated(now.UtcDateTime.AddMinutes(-2))
             .WithRequestedPublishTime(now.AddMinutes(-2))
             .WithExternalReference(ReferenceType.DialogportenDialogId, "d1")
-            .WithAllowSystemDeleteAfter(now.AddDays(30))
             .Build();
         var c2 = new CorrespondenceEntityBuilder()
             .WithCreated(now.UtcDateTime.AddMinutes(-1))
             .WithRequestedPublishTime(now.AddMinutes(-1))
             .WithExternalReference(ReferenceType.DialogportenDialogId, "d2")
-            .WithAllowSystemDeleteAfter(now.AddDays(30))
             .Build();
 
         var repo = new Mock<ICorrespondenceRepository>();
@@ -70,7 +68,6 @@ public async Task ExecuteCleanupInBackground_DoesNotReprocessOrSkipItemsBetweenB
                 .WithCreated(baseTime.AddSeconds(i).UtcDateTime)
                 .WithRequestedPublishTime(baseTime.AddSeconds(i))
                 .WithExternalReference(ReferenceType.DialogportenDialogId, $"d{i}")
-                .WithAllowSystemDeleteAfter(baseTime.AddDays(30))
                 .Build());
         }
 
diff --git a/src/Altinn.Correspondence.API/Controllers/CorrespondenceController.cs b/src/Altinn.Correspondence.API/Controllers/CorrespondenceController.cs
index 32f4a1fd8..724c7c727 100644
--- a/src/Altinn.Correspondence.API/Controllers/CorrespondenceController.cs
+++ b/src/Altinn.Correspondence.API/Controllers/CorrespondenceController.cs
@@ -54,9 +54,6 @@ public CorrespondenceController(ILogger<CorrespondenceController> logger)
         /// <li>1007: Existing attachment not found</li>
         /// <li>1008: DueDateTime cannot be prior to today</li>
         /// <li>1009: DueDateTime cannot be prior to RequestedPublishTime</li>
-        /// <li>1010: AllowSystemDelete cannot be prior to today</li>
-        /// <li>1011: AllowSystemDelete cannot be prior to RequestedPublishTime</li>
-        /// <li>1012: AllowSystemDelete cannot be prior to DueDateTime</li>
         /// <li>1013: Sender cannot delete correspondence that has been published</li>
         /// <li>1016: DueDateTime is required when confirmation is needed</li>
         /// <li>1017: The sender of the correspondence must be equal the sender of existing attachments</li>
@@ -163,9 +160,6 @@ public async Task<ActionResult<InitializeCorrespondencesResponseExt>> Initialize
         /// <li>1007: Existing attachment not found</li>
         /// <li>1008: DueDateTime cannot be prior to today</li>
         /// <li>1009: DueDateTime cannot be prior to RequestedPublishTime</li>
-        /// <li>1010: AllowSystemDelete cannot be prior to today</li>
-        /// <li>1011: AllowSystemDelete cannot be prior to RequestedPublishTime</li>
-        /// <li>1012: AllowSystemDelete cannot be prior to DueDateTime</li>
         /// <li>1013: Sender cannot delete correspondence that has been published</li>
         /// <li>1016: DueDateTime is required when confirmation is needed</li>
         /// <li>1017: The sender of the correspondence must be equal the sender of existing attachments</li>
diff --git a/src/Altinn.Correspondence.API/Mappers/CorrespondenceDetailsMapper.cs b/src/Altinn.Correspondence.API/Mappers/CorrespondenceDetailsMapper.cs
index e35ea973f..9d4f65ee3 100644
--- a/src/Altinn.Correspondence.API/Mappers/CorrespondenceDetailsMapper.cs
+++ b/src/Altinn.Correspondence.API/Mappers/CorrespondenceDetailsMapper.cs
@@ -28,7 +28,6 @@ internal static CorrespondenceDetailsExt MapToExternal(GetCorrespondenceDetailsR
             ResourceId = correspondenceDetails.ResourceId.ToString(),
             RequestedPublishTime = correspondenceDetails.RequestedPublishTime,
             IgnoreReservation = correspondenceDetails.IgnoreReservation,
-            AllowSystemDeleteAfter = correspondenceDetails.AllowSystemDeleteAfter,
             DueDateTime = correspondenceDetails.DueDateTime,
             PropertyList = correspondenceDetails.PropertyList,
             Published = correspondenceDetails.Published,
diff --git a/src/Altinn.Correspondence.API/Mappers/CorrespondenceOverviewMapper.cs b/src/Altinn.Correspondence.API/Mappers/CorrespondenceOverviewMapper.cs
index f1bc59fc9..6f90fe5ec 100644
--- a/src/Altinn.Correspondence.API/Mappers/CorrespondenceOverviewMapper.cs
+++ b/src/Altinn.Correspondence.API/Mappers/CorrespondenceOverviewMapper.cs
@@ -25,7 +25,6 @@ internal static CorrespondenceOverviewExt MapToExternal(GetCorrespondenceOvervie
             ExternalReferences = ExternalReferenceMapper.MapListToExternal(correspondenceOverview.ExternalReferences),
             ResourceId = correspondenceOverview.ResourceId.ToString(),
             RequestedPublishTime = correspondenceOverview.RequestedPublishTime,
-            AllowSystemDeleteAfter = correspondenceOverview.AllowSystemDeleteAfter,
             DueDateTime = correspondenceOverview.DueDateTime,
             PropertyList = correspondenceOverview.PropertyList,
             IgnoreReservation = correspondenceOverview.IgnoreReservation,
diff --git a/src/Altinn.Correspondence.API/Mappers/InitializeCorrespondencesMapper.cs b/src/Altinn.Correspondence.API/Mappers/InitializeCorrespondencesMapper.cs
index b7973064e..fb87174f5 100644
--- a/src/Altinn.Correspondence.API/Mappers/InitializeCorrespondencesMapper.cs
+++ b/src/Altinn.Correspondence.API/Mappers/InitializeCorrespondencesMapper.cs
@@ -25,7 +25,6 @@ internal static OneOf<InitializeCorrespondencesRequest, Error> MapToRequest(Init
             ServiceOwnerId = null, // Will be populated by the handler after determining service owner from ResourceRegistry
             MessageSender = request.Correspondence.MessageSender,
             RequestedPublishTime = request.Correspondence.RequestedPublishTime ?? DateTimeOffset.UtcNow,
-            AllowSystemDeleteAfter = request.Correspondence.AllowSystemDeleteAfter,
             DueDateTime = request.Correspondence.DueDateTime,
             PropertyList = request.Correspondence.PropertyList,
             ReplyOptions = request.Correspondence.ReplyOptions != null ? CorrespondenceReplyOptionsMapper.MapListToEntities(request.Correspondence.ReplyOptions) : new List<CorrespondenceReplyOptionEntity>(),
diff --git a/src/Altinn.Correspondence.API/Mappers/LegacyCorrespondenceOverviewMapper.cs b/src/Altinn.Correspondence.API/Mappers/LegacyCorrespondenceOverviewMapper.cs
index 8a907ff60..4204abd84 100644
--- a/src/Altinn.Correspondence.API/Mappers/LegacyCorrespondenceOverviewMapper.cs
+++ b/src/Altinn.Correspondence.API/Mappers/LegacyCorrespondenceOverviewMapper.cs
@@ -30,7 +30,6 @@ internal static LegacyCorrespondenceOverviewExt MapToExternal(LegacyGetCorrespon
             ExternalReferences = ExternalReferenceMapper.MapListToExternal(correspondenceOverview.ExternalReferences),
             ResourceId = correspondenceOverview.ResourceId.ToString(),
             RequestedPublishTime = correspondenceOverview.RequestedPublishTime,
-            AllowSystemDeleteAfter = correspondenceOverview.AllowSystemDeleteAfter,
             DueDateTime = correspondenceOverview.DueDateTime,
             PropertyList = correspondenceOverview.PropertyList,
             IgnoreReservation = correspondenceOverview.IgnoreReservation,
diff --git a/src/Altinn.Correspondence.API/Mappers/MigrateCorrespondenceMapper.cs b/src/Altinn.Correspondence.API/Mappers/MigrateCorrespondenceMapper.cs
index aff3e5e84..a460a4638 100644
--- a/src/Altinn.Correspondence.API/Mappers/MigrateCorrespondenceMapper.cs
+++ b/src/Altinn.Correspondence.API/Mappers/MigrateCorrespondenceMapper.cs
@@ -27,7 +27,6 @@ internal static async Task<MigrateCorrespondenceRequest> MapToRequestAsync(Migra
             ServiceOwnerId = await serviceOwnerHelper.GetSafeServiceOwnerIdAsync(migrateCorrespondenceExt.CorrespondenceData.Correspondence.Sender, cancellationToken),
             MessageSender = migrateCorrespondenceExt.CorrespondenceData.Correspondence.MessageSender,
             RequestedPublishTime = (DateTimeOffset)migrateCorrespondenceExt.CorrespondenceData.Correspondence.RequestedPublishTime,
-            AllowSystemDeleteAfter = migrateCorrespondenceExt.CorrespondenceData.Correspondence.AllowSystemDeleteAfter,
             DueDateTime = migrateCorrespondenceExt.CorrespondenceData.Correspondence.DueDateTime,
             PropertyList = migrateCorrespondenceExt.CorrespondenceData.Correspondence.PropertyList,
             ReplyOptions = migrateCorrespondenceExt.CorrespondenceData.Correspondence.ReplyOptions != null ? CorrespondenceReplyOptionsMapper.MapListToEntities(migrateCorrespondenceExt.CorrespondenceData.Correspondence.ReplyOptions) : new List<CorrespondenceReplyOptionEntity>(),
diff --git a/src/Altinn.Correspondence.API/Models/BaseCorrespondenceExt.cs b/src/Altinn.Correspondence.API/Models/BaseCorrespondenceExt.cs
index c07f077f1..7065544b7 100644
--- a/src/Altinn.Correspondence.API/Models/BaseCorrespondenceExt.cs
+++ b/src/Altinn.Correspondence.API/Models/BaseCorrespondenceExt.cs
@@ -55,12 +55,6 @@ public class BaseCorrespondenceExt
         [JsonPropertyName("requestedPublishTime")]
         public DateTimeOffset? RequestedPublishTime { get; set; }
 
-        /// <summary>
-        /// When Altinn can remove the correspondence from its database.
-        /// </summary>
-        [JsonPropertyName("allowSystemDeleteAfter")]
-        public DateTimeOffset? AllowSystemDeleteAfter { get; set; }
-
         /// <summary>
         /// When the recipient must reply to the correspondence
         /// </summary>
diff --git a/src/Altinn.Correspondence.API/Models/CorrespondenceExt.cs b/src/Altinn.Correspondence.API/Models/CorrespondenceExt.cs
index 187e54c64..d95524b4a 100644
--- a/src/Altinn.Correspondence.API/Models/CorrespondenceExt.cs
+++ b/src/Altinn.Correspondence.API/Models/CorrespondenceExt.cs
@@ -31,8 +31,6 @@ public class CorrespondenceExt
 
     public required DateTimeOffset RequestedPublishTime { get; set; }
 
-    public DateTimeOffset? AllowSystemDeleteAfter { get; set; }
-
     public DateTimeOffset? DueDateTime { get; set; }
 
     public List<ExternalReferenceEntity> ExternalReferences { get; set; } = new List<ExternalReferenceEntity>();
diff --git a/src/Altinn.Correspondence.Application/Errors.cs b/src/Altinn.Correspondence.Application/Errors.cs
index f5a49d3cc..11aa45ccc 100644
--- a/src/Altinn.Correspondence.Application/Errors.cs
+++ b/src/Altinn.Correspondence.Application/Errors.cs
@@ -14,9 +14,6 @@ public static class CorrespondenceErrors
     public static Error ExistingAttachmentNotFound = new Error(1007, "Existing attachment not found", HttpStatusCode.BadRequest);
     public static Error DueDatePriorToday = new Error(1008, "DueDateTime cannot be prior to today", HttpStatusCode.BadRequest);
     public static Error DueDatePriorRequestedPublishTime = new Error(1009, "DueDateTime cannot be prior to RequestedPublishTime", HttpStatusCode.BadRequest);
-    public static Error AllowSystemDeletePriorToday = new Error(1010, "AllowSystemDelete cannot be prior to today", HttpStatusCode.BadRequest);
-    public static Error AllowSystemDeletePriorRequestedPublishTime = new Error(1011, "AllowSystemDelete cannot be prior to RequestedPublishTime", HttpStatusCode.BadRequest);
-    public static Error AllowSystemDeletePriorDueDate = new Error(1012, "AllowSystemDelete cannot be prior to DueDateTime", HttpStatusCode.BadRequest);
     public static Error CantPurgePublishedCorrespondence = new Error(1013, "Sender cannot delete correspondence that has been published", HttpStatusCode.BadRequest);
     public static Error CorrespondenceAlreadyPurged = new Error(1014, "Correspondence has already been purged", HttpStatusCode.BadRequest);
     public static Error CouldNotRetrieveStatus = new Error(1015, "Could not retrieve highest status for correspondence", HttpStatusCode.BadRequest);
diff --git a/src/Altinn.Correspondence.Application/GetCorrespondenceDetails/GetCorrespondenceDetailsHandler.cs b/src/Altinn.Correspondence.Application/GetCorrespondenceDetails/GetCorrespondenceDetailsHandler.cs
index 4b54af3a0..03007506b 100644
--- a/src/Altinn.Correspondence.Application/GetCorrespondenceDetails/GetCorrespondenceDetailsHandler.cs
+++ b/src/Altinn.Correspondence.Application/GetCorrespondenceDetails/GetCorrespondenceDetailsHandler.cs
@@ -175,7 +175,6 @@ await correspondenceStatusRepository.AddCorrespondenceStatusFetched(new Correspo
                 ResourceId = correspondence.ResourceId,
                 RequestedPublishTime = correspondence.RequestedPublishTime,
                 IgnoreReservation = correspondence.IgnoreReservation ?? false,
-                AllowSystemDeleteAfter = correspondence.AllowSystemDeleteAfter,
                 DueDateTime = correspondence.DueDateTime,
                 PropertyList = correspondence.PropertyList,
                 Published = correspondence.Published,
diff --git a/src/Altinn.Correspondence.Application/GetCorrespondenceDetails/GetCorrespondenceDetailsResponse.cs b/src/Altinn.Correspondence.Application/GetCorrespondenceDetails/GetCorrespondenceDetailsResponse.cs
index fb255d885..ca624753b 100644
--- a/src/Altinn.Correspondence.Application/GetCorrespondenceDetails/GetCorrespondenceDetailsResponse.cs
+++ b/src/Altinn.Correspondence.Application/GetCorrespondenceDetails/GetCorrespondenceDetailsResponse.cs
@@ -40,8 +40,6 @@ public class GetCorrespondenceDetailsResponse
 
     public bool IgnoreReservation { get; set; }
 
-    public DateTimeOffset? AllowSystemDeleteAfter { get; set; }
-
     public DateTimeOffset? DueDateTime { get; set; }
 
     public Dictionary<string, string> PropertyList { get; set; } = new Dictionary<string, string>();
diff --git a/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/GetCorrespondenceOverviewHandler.cs b/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/GetCorrespondenceOverviewHandler.cs
index 35a30ef5f..e43f2b20a 100644
--- a/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/GetCorrespondenceOverviewHandler.cs
+++ b/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/GetCorrespondenceOverviewHandler.cs
@@ -161,7 +161,6 @@ await correspondenceStatusRepository.AddCorrespondenceStatus(new CorrespondenceS
                 ExternalReferences = correspondence.ExternalReferences ?? new List<ExternalReferenceEntity>(),
                 RequestedPublishTime = correspondence.RequestedPublishTime,
                 IgnoreReservation = correspondence.IgnoreReservation ?? false,
-                AllowSystemDeleteAfter = correspondence.AllowSystemDeleteAfter,
                 Published = correspondence.Published,
                 IsConfirmationNeeded = correspondence.IsConfirmationNeeded,
                 IsConfidential = correspondence.IsConfidential
diff --git a/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/GetCorrespondenceOverviewResponse.cs b/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/GetCorrespondenceOverviewResponse.cs
index cc6f9d56b..d6970e546 100644
--- a/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/GetCorrespondenceOverviewResponse.cs
+++ b/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/GetCorrespondenceOverviewResponse.cs
@@ -39,8 +39,6 @@ public class GetCorrespondenceOverviewResponse
 
     public bool IgnoreReservation { get; set; }
 
-    public DateTimeOffset? AllowSystemDeleteAfter { get; set; }
-
     public DateTimeOffset? DueDateTime { get; set; }
 
     public Dictionary<string, string> PropertyList { get; set; } = new Dictionary<string, string>();
diff --git a/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/LegacyGetCorrespondenceOverviewHandler.cs b/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/LegacyGetCorrespondenceOverviewHandler.cs
index 11af1d137..8a13f1dec 100644
--- a/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/LegacyGetCorrespondenceOverviewHandler.cs
+++ b/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/LegacyGetCorrespondenceOverviewHandler.cs
@@ -136,7 +136,6 @@ await correspondenceStatusRepository.AddCorrespondenceStatus(new CorrespondenceS
                 ExternalReferences = correspondence.ExternalReferences ?? new List<ExternalReferenceEntity>(),
                 RequestedPublishTime = correspondence.RequestedPublishTime,
                 IgnoreReservation = correspondence.IgnoreReservation ?? false,
-                AllowSystemDeleteAfter = correspondence.AllowSystemDeleteAfter,
                 Published = correspondence.Published,
                 IsConfirmationNeeded = correspondence.IsConfirmationNeeded,
                 MinimumAuthenticationLevel = (int)minimumAuthLevel,
diff --git a/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/LegacyGetCorrespondenceOverviewResponse.cs b/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/LegacyGetCorrespondenceOverviewResponse.cs
index 81537835f..f390be4a0 100644
--- a/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/LegacyGetCorrespondenceOverviewResponse.cs
+++ b/src/Altinn.Correspondence.Application/GetCorrespondenceOverview/LegacyGetCorrespondenceOverviewResponse.cs
@@ -52,8 +52,6 @@ public class LegacyGetCorrespondenceOverviewResponse
 
     public bool IgnoreReservation { get; set; }
 
-    public DateTimeOffset? AllowSystemDeleteAfter { get; set; }
-
     public DateTimeOffset? DueDateTime { get; set; }
 
     public Dictionary<string, string> PropertyList { get; set; } = new Dictionary<string, string>();
diff --git a/src/Altinn.Correspondence.Application/Helpers/InitializeCorrespondenceHelper.cs b/src/Altinn.Correspondence.Application/Helpers/InitializeCorrespondenceHelper.cs
index abff301ed..e32bbabbf 100644
--- a/src/Altinn.Correspondence.Application/Helpers/InitializeCorrespondenceHelper.cs
+++ b/src/Altinn.Correspondence.Application/Helpers/InitializeCorrespondenceHelper.cs
@@ -38,21 +38,6 @@ public class InitializeCorrespondenceHelper(
                     return CorrespondenceErrors.DueDatePriorRequestedPublishTime;
                 }
             }
-            if (correspondence.AllowSystemDeleteAfter is not null)
-            {
-                if (correspondence.AllowSystemDeleteAfter < DateTimeOffset.UtcNow)
-                {
-                    return CorrespondenceErrors.AllowSystemDeletePriorToday;
-                }
-                if (correspondence.AllowSystemDeleteAfter < RequestedPublishTime)
-                {
-                    return CorrespondenceErrors.AllowSystemDeletePriorRequestedPublishTime;
-                }
-                if (correspondence.DueDateTime is not null && correspondence.AllowSystemDeleteAfter < correspondence.DueDateTime)
-                {
-                    return CorrespondenceErrors.AllowSystemDeletePriorDueDate;
-                }
-            }
             return null;
         }
 
@@ -361,7 +346,6 @@ public async Task<CorrespondenceEntity> MapToCorrespondenceEntityAsync(Initializ
                     MessageTitle = AddRecipientToMessage(request.Correspondence.Content.MessageTitle, partyDetails?.Name),
                 },
                 RequestedPublishTime = request.Correspondence.RequestedPublishTime,
-                AllowSystemDeleteAfter = request.Correspondence.AllowSystemDeleteAfter,
                 DueDateTime = request.Correspondence.DueDateTime,
                 PropertyList = request.Correspondence.PropertyList.ToDictionary(x => x.Key, x => x.Value),
                 ReplyOptions = request.Correspondence.ReplyOptions.Select(requestReplyOption => new CorrespondenceReplyOptionEntity()
diff --git a/src/Altinn.Correspondence.Persistence/Repositories/CorrespondenceRepository.cs b/src/Altinn.Correspondence.Persistence/Repositories/CorrespondenceRepository.cs
index 5b727c993..78865eda0 100644
--- a/src/Altinn.Correspondence.Persistence/Repositories/CorrespondenceRepository.cs
+++ b/src/Altinn.Correspondence.Persistence/Repositories/CorrespondenceRepository.cs
@@ -394,7 +394,6 @@ public async Task<List<CorrespondenceEntity>> GetCorrespondencesByIdsWithExterna
                 .AsNoTracking()
                 .AsSplitQuery()
                 .Where(c => correspondenceIds.Contains(c.Id))
-                .Where(c => c.AllowSystemDeleteAfter != null)
                 .Where(c => c.ExternalReferences.Any(er => er.ReferenceType == referenceType))
                 .Include(c => c.ExternalReferences)
                 .ToListAsync(cancellationToken);