diff --git a/api/share/utils.py b/api/share/utils.py
index 97941de145d..d9ffd388771 100644
--- a/api/share/utils.py
+++ b/api/share/utils.py
@@ -118,7 +118,7 @@ def share_update_cedar_metadata_record(self, referent_id, cedar_record_pk):
         shtrove_ingest_url(),
         params={
             'focus_iri': referent.get_semantic_iri(),
-            'record_identifier': _shtrove_cedar_record_identifier(cedar_record._id, cedar_record.template.cedar_id),
+            'record_identifier': _shtrove_cedar_record_identifier(referent._id, cedar_record.template.cedar_id),
             'is_supplementary': True,
         },
         headers={
@@ -142,7 +142,7 @@ def share_delete_cedar_metadata_record(
     response = requests.delete(
         shtrove_ingest_url(),
         params={
-            'record_identifier': _shtrove_cedar_record_identifier(cedar_record___id, cedar_template_cedar_id),
+            'record_identifier': _shtrove_cedar_record_identifier(cedar_referent___id, cedar_template_cedar_id),
         },
         headers=_shtrove_auth_headers(referent),
     )
@@ -300,8 +300,8 @@ def _shtrove_record_identifier(osf_item, osfmap_partition: OsfmapPartition):
     )
 
 
-def _shtrove_cedar_record_identifier(cedar_record___id, template_cedar_id) -> str:
-    return f'{cedar_record___id}/CedarMetadataRecord:{template_cedar_id}'
+def _shtrove_cedar_record_identifier(referent_osfid, template_cedar_id) -> str:
+    return f'{referent_osfid}/CedarMetadataRecord:{template_cedar_id}'
 
 
 def _shtrove_auth_headers(osf_item):
diff --git a/osf_tests/test_collection_submission.py b/osf_tests/test_collection_submission.py
index cd719c40bb5..327447e313e 100644
--- a/osf_tests/test_collection_submission.py
+++ b/osf_tests/test_collection_submission.py
@@ -874,12 +874,12 @@ def test_cedar_record_identifier_on_create(self, mock_delete, mock_pls, unmodera
             with mock.patch('api.share.utils._shtrove_cedar_record_identifier') as mock_identifier:
                 unmoderated_collection_submission_public.save()
                 mock_identifier.assert_called_with(
-                    to_create_record._id,
+                    to_create_record.guid._id,
                     to_create_record.template.cedar_id
                 )
                 assert (
-                    _shtrove_cedar_record_identifier(to_create_record._id, to_create_record.template.cedar_id) ==
-                    f'{to_create_record._id}/CedarMetadataRecord:http26'
+                    _shtrove_cedar_record_identifier(to_create_record.guid._id, to_create_record.template.cedar_id) ==
+                    f'{to_create_record.guid._id}/CedarMetadataRecord:http26'
                 )
 
     @mock.patch('api.share.utils.pls_send_trove_record')
@@ -897,10 +897,10 @@ def test_cedar_record_identifier_on_delete(self, mock_update, mock_pls, unmodera
         with mock.patch('api.share.utils.requests.delete'):
             with mock.patch('api.share.utils._shtrove_cedar_record_identifier') as mock_identifier:
                 unmoderated_collection_submission_public.save()
-                mock_identifier.assert_called_with(to_delete_record._id, to_delete_record.template.cedar_id)
+                mock_identifier.assert_called_with(to_delete_record.guid._id, to_delete_record.template.cedar_id)
                 assert (
-                    _shtrove_cedar_record_identifier(to_delete_record._id, to_delete_record.template.cedar_id) ==
-                    f'{to_delete_record._id}/CedarMetadataRecord:http25'
+                    _shtrove_cedar_record_identifier(to_delete_record.guid._id, to_delete_record.template.cedar_id) ==
+                    f'{to_delete_record.guid._id}/CedarMetadataRecord:http25'
                 )
 
     @mock.patch('api.share.utils.share_update_cedar_metadata_record')