diff --git a/CHANGELOG.md b/CHANGELOG.md
index 562db82..27ca8f7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,8 @@
 ## 1.5.0 (Unreleased)
 
 FEATURES:
-  * **Added option to cache PowerDNS API response ** ([#81](https://github.com/pan-net/terraform-provider-powerdns/pull/81), @menai34)
+  * **Added option to cache PowerDNS API response** ([#81](https://github.com/pan-net/terraform-provider-powerdns/pull/81), @menai34)
+  * **Fixed resources with upper case names not destroyed** ([#88](https://github.com/pan-net/terraform-provider-powerdns/pull/88), @PetrusHahol)
 
 ## 1.4.1 (January 21, 2021)
 
diff --git a/powerdns/client.go b/powerdns/client.go
index db3b16f..ad25835 100644
--- a/powerdns/client.go
+++ b/powerdns/client.go
@@ -522,7 +522,7 @@ func (client *Client) ListRecordsInRRSet(zone string, name string, tpe string) (
 
 	records := make([]Record, 0, 10)
 	for _, r := range allRecords {
-		if r.Name == name && r.Type == tpe {
+		if strings.EqualFold(r.Name, name) && r.Type == tpe {
 			records = append(records, r)
 		}
 	}
@@ -547,7 +547,7 @@ func (client *Client) RecordExists(zone string, name string, tpe string) (bool,
 	}
 
 	for _, record := range allRecords {
-		if record.Name == name && record.Type == tpe {
+		if strings.EqualFold(record.Name, name) && record.Type == tpe {
 			return true, nil
 		}
 	}
diff --git a/powerdns/resource_powerdns_record.go b/powerdns/resource_powerdns_record.go
index d2be002..bb29c1a 100644
--- a/powerdns/resource_powerdns_record.go
+++ b/powerdns/resource_powerdns_record.go
@@ -24,12 +24,18 @@ func resourcePDNSRecord() *schema.Resource {
 				Type:     schema.TypeString,
 				Required: true,
 				ForceNew: true,
+				DiffSuppressFunc: func(k, old, new string, d *schema.ResourceData) bool {
+					return strings.EqualFold(old, new)
+				},
 			},
 
 			"name": {
 				Type:     schema.TypeString,
 				Required: true,
 				ForceNew: true,
+				DiffSuppressFunc: func(k, old, new string, d *schema.ResourceData) bool {
+					return strings.EqualFold(old, new)
+				},
 			},
 
 			"type": {
diff --git a/powerdns/resource_powerdns_record_test.go b/powerdns/resource_powerdns_record_test.go
index 4641387..ac2e5a4 100644
--- a/powerdns/resource_powerdns_record_test.go
+++ b/powerdns/resource_powerdns_record_test.go
@@ -444,6 +444,52 @@ func TestAccPDNSRecord_SOA(t *testing.T) {
 	})
 }
 
+func TestAccPDNSRecord_A_ZoneMixedCaps(t *testing.T) {
+	resourceName := "powerdns_record.test-a"
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckPDNSRecordDestroy,
+		Steps: []resource.TestStep{
+			{
+				// using mixed caps for zone property to create resource with A type
+				Config: testPDNSRecordConfigZoneMixedCaps,
+			},
+			{
+				// using A type record config to confirm plan doesn't generate diff
+				ResourceName:       resourceName,
+				Config:             testPDNSRecordConfigA,
+				ExpectNonEmptyPlan: false,
+				PlanOnly:           true,
+			},
+		},
+	})
+}
+
+func TestAccPDNSRecord_A_NameMixedCaps(t *testing.T) {
+	resourceName := "powerdns_record.test-a"
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckPDNSRecordDestroy,
+		Steps: []resource.TestStep{
+			{
+				// using mixed caps for name property to create resource with A type
+				Config: testPDNSRecordConfigNameMixedCaps,
+			},
+			{
+				// using A type record config to confirm plan doesn't generate diff
+				ResourceName:       resourceName,
+				Config:             testPDNSRecordConfigA,
+				ExpectNonEmptyPlan: false,
+				PlanOnly:           true,
+			},
+		},
+	})
+}
+
 func testAccCheckPDNSRecordDestroy(s *terraform.State) error {
 	for _, rs := range s.RootModule().Resources {
 		if rs.Type != "powerdns_record" {
@@ -654,3 +700,21 @@ resource "powerdns_record" "test-soa" {
 	ttl = 3600
 	records = [ "something.something. hostmaster.sysa.xyz. 2019090301 10800 3600 604800 3600" ]
 }`
+
+const testPDNSRecordConfigZoneMixedCaps = `
+resource "powerdns_record" "test-a" {
+	zone = "sySa.xyz."
+	name = "testpdnsrecordconfiga.sysa.xyz."
+	type = "A"
+	ttl = 60
+	records = [ "1.1.1.1", "2.2.2.2" ]
+}`
+
+const testPDNSRecordConfigNameMixedCaps = `
+resource "powerdns_record" "test-a" {
+	zone = "sysa.xyz."
+	name = "TestPDNSRecordConfigA.sysa.xyz."
+	type = "A"
+	ttl = 60
+	records = [ "1.1.1.1", "2.2.2.2" ]
+}`
diff --git a/powerdns/resource_powerdns_zone.go b/powerdns/resource_powerdns_zone.go
index 88705c8..95746ef 100644
--- a/powerdns/resource_powerdns_zone.go
+++ b/powerdns/resource_powerdns_zone.go
@@ -27,6 +27,9 @@ func resourcePDNSZone() *schema.Resource {
 				Type:     schema.TypeString,
 				Required: true,
 				ForceNew: true,
+				DiffSuppressFunc: func(k, old, new string, d *schema.ResourceData) bool {
+					return strings.EqualFold(old, new)
+				},
 			},
 
 			"kind": {
diff --git a/powerdns/resource_powerdns_zone_test.go b/powerdns/resource_powerdns_zone_test.go
index 0e2b4e9..40c7be1 100644
--- a/powerdns/resource_powerdns_zone_test.go
+++ b/powerdns/resource_powerdns_zone_test.go
@@ -66,7 +66,7 @@ func TestAccPDNSZoneNativeSmallCaps(t *testing.T) {
 		CheckDestroy: testAccCheckPDNSZoneDestroy,
 		Steps: []resource.TestStep{
 			{
-				// using small caps config to create resource with test-native name
+				// using small caps config to create resource with test-native kind
 				Config: testPDNSZoneConfigNativeSmallCaps,
 			},
 			{
@@ -80,6 +80,29 @@ func TestAccPDNSZoneNativeSmallCaps(t *testing.T) {
 	})
 }
 
+func TestAccPDNSZoneNativeNameMixedCaps(t *testing.T) {
+	resourceName := "powerdns_zone.test-native"
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckPDNSZoneDestroy,
+		Steps: []resource.TestStep{
+			{
+				// using mixed caps config to create resource with test-native name
+				Config: testPDNSZoneConfigNativeNameMixedCaps,
+			},
+			{
+				// using test-native config with Native to confirm plan doesn't generate diff
+				ResourceName:       resourceName,
+				Config:             testPDNSZoneConfigNative,
+				ExpectNonEmptyPlan: false,
+				PlanOnly:           true,
+			},
+		},
+	})
+}
+
 func TestAccPDNSZoneMaster(t *testing.T) {
 	resourceName := "powerdns_zone.test-master"
 
@@ -444,6 +467,13 @@ resource "powerdns_zone" "test-native" {
 	nameservers = ["ns1.sysa.abc.", "ns2.sysa.abc."]
 }`
 
+const testPDNSZoneConfigNativeNameMixedCaps = `
+resource "powerdns_zone" "test-native" {
+	name = "sySa.abc."
+	kind = "native"
+	nameservers = ["ns1.sysa.abc.", "ns2.sysa.abc."]
+}`
+
 const testPDNSZoneConfigMaster = `
 resource "powerdns_zone" "test-master" {
 	name = "master.sysa.abc."