diff --git a/packages/service-library/src/servicelib/aiohttp/rest_middlewares.py b/packages/service-library/src/servicelib/aiohttp/rest_middlewares.py
index 4847389b7195..d40abae5669d 100644
--- a/packages/service-library/src/servicelib/aiohttp/rest_middlewares.py
+++ b/packages/service-library/src/servicelib/aiohttp/rest_middlewares.py
@@ -51,14 +51,13 @@ def _process_and_raise_unexpected_error(request: web.BaseRequest, err: Exception
             "request.path": f"{request.path}",
         }
 
-        user_error_msg = _FMSG_INTERNAL_ERROR_USER_FRIENDLY.format(
-            error_code=error_code
-        )
+        user_error_msg = _FMSG_INTERNAL_ERROR_USER_FRIENDLY
         http_error = create_http_error(
             err,
             user_error_msg,
             web.HTTPInternalServerError,
             skip_internal_error_details=_is_prod,
+            error_code=error_code,
         )
         _logger.exception(
             **create_troubleshotting_log_kwargs(
diff --git a/packages/service-library/src/servicelib/aiohttp/rest_responses.py b/packages/service-library/src/servicelib/aiohttp/rest_responses.py
index 312e9c987db0..8ddf5090b5a9 100644
--- a/packages/service-library/src/servicelib/aiohttp/rest_responses.py
+++ b/packages/service-library/src/servicelib/aiohttp/rest_responses.py
@@ -5,8 +5,10 @@
 
 from aiohttp import web, web_exceptions
 from aiohttp.web_exceptions import HTTPError, HTTPException
+from common_library.error_codes import ErrorCodeStr
 from common_library.json_serialization import json_dumps
 from models_library.rest_error import ErrorGet, ErrorItemType
+from servicelib.rest_constants import RESPONSE_MODEL_POLICY
 
 from ..aiohttp.status import HTTP_200_OK
 from ..mimetype_constants import MIMETYPE_APPLICATION_JSON
@@ -52,6 +54,7 @@ def create_http_error(
     http_error_cls: type[HTTPError] = web.HTTPInternalServerError,
     *,
     skip_internal_error_details: bool = False,
+    error_code: ErrorCodeStr | None = None
 ) -> HTTPError:
     """
     - Response body conforms OAS schema model
@@ -61,33 +64,38 @@ def create_http_error(
     if not isinstance(errors, list):
         errors = [errors]
 
-    # TODO: guarantee no throw!
-
     is_internal_error: bool = http_error_cls == web.HTTPInternalServerError
     default_message = reason or get_code_description(http_error_cls.status_code)
 
     if is_internal_error and skip_internal_error_details:
-        error = ErrorGet(
-            errors=[],
-            logs=[],
-            status=http_error_cls.status_code,
-            message=default_message,
+        error = ErrorGet.model_validate(
+            {
+                "status": http_error_cls.status_code,
+                "message": default_message,
+                "support_id": error_code,
+            }
         )
     else:
         items = [ErrorItemType.from_error(err) for err in errors]
-        error = ErrorGet(
-            errors=items,
-            logs=[],
-            status=http_error_cls.status_code,
-            message=default_message,
+        error = ErrorGet.model_validate(
+            {
+                "errors": items,  # NOTE: deprecated!
+                "status": http_error_cls.status_code,
+                "message": default_message,
+                "support_id": error_code,
+            }
         )
 
     assert not http_error_cls.empty_body  # nosec
-    payload = wrap_as_envelope(error=error)
+    payload = wrap_as_envelope(
+        error=error.model_dump(mode="json", **RESPONSE_MODEL_POLICY)
+    )
 
     return http_error_cls(
         reason=reason,
-        text=json_dumps(payload),
+        text=json_dumps(
+            payload,
+        ),
         content_type=MIMETYPE_APPLICATION_JSON,
     )
 
diff --git a/packages/service-library/tests/aiohttp/test_rest_responses.py b/packages/service-library/tests/aiohttp/test_rest_responses.py
index d1b28d1e9fe2..9865c805bfd8 100644
--- a/packages/service-library/tests/aiohttp/test_rest_responses.py
+++ b/packages/service-library/tests/aiohttp/test_rest_responses.py
@@ -3,6 +3,7 @@
 # pylint: disable=unused-variable
 
 import itertools
+import json
 
 import pytest
 from aiohttp import web
@@ -15,6 +16,7 @@
     HTTPNotModified,
     HTTPOk,
 )
+from common_library.error_codes import ErrorCodeStr, create_error_code
 from servicelib.aiohttp import status
 from servicelib.aiohttp.rest_responses import create_http_error, exception_to_response
 from servicelib.aiohttp.web_exceptions_extension import (
@@ -58,26 +60,40 @@ def test_collected_http_errors_map(status_code: int, http_error_cls: type[HTTPEr
 
 
 @pytest.mark.parametrize("skip_details", [True, False])
-def tests_exception_to_response(skip_details: bool):
-    exception = create_http_error(
-        errors=[RuntimeError("foo")],
-        reason="Something whent wrong",
+@pytest.mark.parametrize("error_code", [None, create_error_code(Exception("fake"))])
+def tests_exception_to_response(skip_details: bool, error_code: ErrorCodeStr | None):
+
+    expected_reason = "Something whent wrong !"
+    expected_exceptions: list[Exception] = [RuntimeError("foo")]
+
+    http_error = create_http_error(
+        errors=expected_exceptions,
+        reason=expected_reason,
         http_error_cls=web.HTTPInternalServerError,
         skip_internal_error_details=skip_details,
+        error_code=error_code,
     )
 
     # For now until deprecated SEE https://github.com/aio-libs/aiohttp/issues/2415
-    assert isinstance(exception, Exception)
-    assert isinstance(exception, web.Response)
-    assert hasattr(exception, "__http_exception__")
+    assert isinstance(http_error, Exception)
+    assert isinstance(http_error, web.Response)
+    assert hasattr(http_error, "__http_exception__")
 
     # until they have exception.make_response(), we user
-    response = exception_to_response(exception)
+    response = exception_to_response(http_error)
     assert isinstance(response, web.Response)
     assert not isinstance(response, Exception)
     assert not hasattr(response, "__http_exception__")
 
+    # checks response components
     assert response.content_type == MIMETYPE_APPLICATION_JSON
     assert response.status == status.HTTP_500_INTERNAL_SERVER_ERROR
     assert response.text
     assert response.body
+
+    # checks response model
+    response_json = json.loads(response.text)
+    assert response_json["data"] is None
+    assert response_json["error"]["message"] == expected_reason
+    assert response_json["error"]["supportId"] == error_code
+    assert response_json["error"]["status"] == response.status