diff --git a/api/consumer/searchDocumentReference/tests/test_search_document_reference_consumer.py b/api/consumer/searchDocumentReference/tests/test_search_document_reference_consumer.py
index 3d6e65ba4..4f5c3333a 100644
--- a/api/consumer/searchDocumentReference/tests/test_search_document_reference_consumer.py
+++ b/api/consumer/searchDocumentReference/tests/test_search_document_reference_consumer.py
@@ -1,4 +1,5 @@
 import json
+from unittest.mock import patch
 
 from moto import mock_aws
 
@@ -720,7 +721,10 @@ def test_search_document_reference_invalid_category(
 
 @mock_aws
 @mock_repository
-def test_search_document_reference_invalid_json(repository: DocumentPointerRepository):
+@patch("api.consumer.searchDocumentReference.search_document_reference.logger")
+def test_search_document_reference_invalid_json(
+    mock_logger, repository: DocumentPointerRepository
+):
     doc_ref = load_document_reference("Y05868-736253002-Valid")
     doc_pointer = DocumentPointer.from_document_reference(doc_ref)
     repository.create(doc_pointer)
@@ -783,3 +787,7 @@ def test_search_document_reference_invalid_json(repository: DocumentPointerRepos
             {"resource": expected_operation_outcome},
         ],
     }
+
+    assert any(
+        call[0][0].name == "CONSEARCH005" for call in mock_logger.log.call_args_list
+    )
diff --git a/api/consumer/searchPostDocumentReference/tests/test_search_post_document_reference_consumer.py b/api/consumer/searchPostDocumentReference/tests/test_search_post_document_reference_consumer.py
index 4a181fdc7..127a6dc12 100644
--- a/api/consumer/searchPostDocumentReference/tests/test_search_post_document_reference_consumer.py
+++ b/api/consumer/searchPostDocumentReference/tests/test_search_post_document_reference_consumer.py
@@ -1,4 +1,5 @@
 import json
+from unittest.mock import patch
 
 from moto import mock_aws
 
@@ -480,8 +481,9 @@ def test_search_document_reference_invalid_category(
 
 @mock_aws
 @mock_repository
+@patch("api.consumer.searchPostDocumentReference.search_post_document_reference.logger")
 def test_search_post_document_reference_invalid_json_adds_operation_outcome(
-    repository: DocumentPointerRepository,
+    mock_logger, repository: DocumentPointerRepository
 ):
     doc_ref = load_document_reference("Y05868-736253002-Valid")
     doc_pointer = DocumentPointer.from_document_reference(doc_ref)
@@ -547,3 +549,7 @@ def test_search_post_document_reference_invalid_json_adds_operation_outcome(
             {"resource": expected_operation_outcome},
         ],
     }
+
+    assert any(
+        call[0][0].name == "CONPOSTSEARCH005" for call in mock_logger.log.call_args_list
+    )
diff --git a/api/producer/searchDocumentReference/tests/test_search_document_reference_producer.py b/api/producer/searchDocumentReference/tests/test_search_document_reference_producer.py
index 92de1ef8e..848098dc9 100644
--- a/api/producer/searchDocumentReference/tests/test_search_document_reference_producer.py
+++ b/api/producer/searchDocumentReference/tests/test_search_document_reference_producer.py
@@ -1,4 +1,5 @@
 import json
+from unittest.mock import patch
 
 from moto import mock_aws
 
@@ -457,7 +458,10 @@ def test_search_document_reference_filters_by_pointer_types(
 
 @mock_aws
 @mock_repository
-def test_search_document_reference_invalid_json(repository: DocumentPointerRepository):
+@patch("api.producer.searchDocumentReference.search_document_reference.logger")
+def test_search_document_reference_invalid_json(
+    mock_logger, repository: DocumentPointerRepository
+):
     doc_ref = load_document_reference("Y05868-736253002-Valid")
     doc_pointer = DocumentPointer.from_document_reference(doc_ref)
     repository.create(doc_pointer)
@@ -514,3 +518,7 @@ def test_search_document_reference_invalid_json(repository: DocumentPointerRepos
             {"resource": expected_operation_outcome},
         ],
     }
+
+    assert any(
+        call[0][0].name == "PROSEARCH005" for call in mock_logger.log.call_args_list
+    )
diff --git a/api/producer/searchPostDocumentReference/tests/test_search_post_document_reference_producer.py b/api/producer/searchPostDocumentReference/tests/test_search_post_document_reference_producer.py
index c95a6dba6..63f4f7f5b 100644
--- a/api/producer/searchPostDocumentReference/tests/test_search_post_document_reference_producer.py
+++ b/api/producer/searchPostDocumentReference/tests/test_search_post_document_reference_producer.py
@@ -1,4 +1,5 @@
 import json
+from unittest.mock import patch
 
 from moto import mock_aws
 
@@ -474,7 +475,9 @@ def test_search_document_reference_filters_by_pointer_types(
 
 @mock_aws
 @mock_repository
+@patch("api.producer.searchPostDocumentReference.search_post_document_reference.logger")
 def test_search_post_document_reference_invalid_json_adds_operation_outcome(
+    mock_logger,
     repository: DocumentPointerRepository,
 ):
     doc_ref = load_document_reference("Y05868-736253002-Valid")
@@ -535,3 +538,7 @@ def test_search_post_document_reference_invalid_json_adds_operation_outcome(
             {"resource": expected_operation_outcome},
         ],
     }
+
+    assert any(
+        call[0][0].name == "PROPOSTSEARCH005" for call in mock_logger.log.call_args_list
+    )
diff --git a/layer/nrlf/core/log_references.py b/layer/nrlf/core/log_references.py
index 5c812c66a..c071b0981 100644
--- a/layer/nrlf/core/log_references.py
+++ b/layer/nrlf/core/log_references.py
@@ -7,6 +7,14 @@ class _Reference:
     level: str
     message: str
 
+    # WARNING: This makes all _Reference objects unequal unless they are the same instance.
+    # It's fine for our use case, but be cautious if you compare _Reference objects.
+    def __eq__(self, other):
+        return self is other
+
+    def __hash__(self):
+        return id(self)
+
 
 class LogReference(Enum):
     # Request Handler Logs