diff --git a/credentials/apps/api/v2/tests/test_views.py b/credentials/apps/api/v2/tests/test_views.py
index a0c1b65cc..905ca97d8 100644
--- a/credentials/apps/api/v2/tests/test_views.py
+++ b/credentials/apps/api/v2/tests/test_views.py
@@ -691,3 +691,15 @@ def test_existing_and_non_existing_users(self):
         response = self.call_api(self.service_user, data)
         self.assertEqual(response.status_code, 200)
         self.assertEqual(response.data, expected_response)
+
+    def test_clears_full_name_for_replaced_user(self):
+        """Verify username replacement also clears full_name for user retirement."""
+        user = UserFactory(full_name="Jane Example")
+        new_username = f"{user.username}_retired"
+
+        response = self.call_api(self.service_user, {"username_mappings": [{user.username: new_username}]})
+
+        self.assertEqual(response.status_code, 200)
+        user.refresh_from_db()
+        self.assertEqual(user.username, new_username)
+        self.assertEqual(user.full_name, "")
diff --git a/credentials/apps/api/v2/views.py b/credentials/apps/api/v2/views.py
index 00b0de9c4..c1d984444 100644
--- a/credentials/apps/api/v2/views.py
+++ b/credentials/apps/api/v2/views.py
@@ -263,9 +263,11 @@ def _replace_username_for_all_models(self, current_username, new_username, repla
             with transaction.atomic():
                 num_rows_changed = 0
                 for model, column in replacement_locations:
-                    num_rows_changed += model.objects.filter(**{column: current_username}).update(
-                        **{column: new_username}
-                    )
+                    update_kwargs = {column: new_username}
+                    # Clear full_name for user retirement anonymization
+                    if model._meta.label_lower == "core.user" and column == "username":
+                        update_kwargs["full_name"] = ""
+                    num_rows_changed += model.objects.filter(**{column: current_username}).update(**update_kwargs)
         except Exception as exc:
             log.exception(
                 "Unable to change username from %s to %s. Failed on table %s because %s",