diff --git a/backend/pashub_fetcher/pashub_client.py b/backend/pashub_fetcher/pashub_client.py
index 024da8464..11cf403c7 100644
--- a/backend/pashub_fetcher/pashub_client.py
+++ b/backend/pashub_fetcher/pashub_client.py
@@ -41,6 +41,10 @@ class UnauthorizedError(Exception):
     pass
 
 
+class TruncatedEvidenceListError(Exception):
+    pass
+
+
 class PashubClient:
     def __init__(self, token: str):
 
diff --git a/backend/pashub_fetcher/tests/test_pashub_client.py b/backend/pashub_fetcher/tests/test_pashub_client.py
index 79257bf58..885b4cc3b 100644
--- a/backend/pashub_fetcher/tests/test_pashub_client.py
+++ b/backend/pashub_fetcher/tests/test_pashub_client.py
@@ -12,6 +12,7 @@ from backend.pashub_fetcher.pashub_client import (
     DownloadedFiles,
     PashubClient,
     RdSapSummary,
+    TruncatedEvidenceListError,
     UnauthorizedError,
 )
 
@@ -377,3 +378,17 @@ def test_get_evidence_list_requests_a_single_large_page() -> None:
         "pageIndex": 0,
         "pageSize": 100,
     }
+
+
+def test_get_evidence_list_raises_when_response_is_truncated() -> None:
+    # Arrange
+    client = make_client()
+    payload = {
+        "results": [make_evidence_item(f"id-{i}") for i in range(100)],
+        "totalItemCount": 250,
+    }
+    client.session.get = MagicMock(return_value=make_response(payload=payload))
+
+    # Act / Assert
+    with pytest.raises(TruncatedEvidenceListError, match=r"100 of 250"):
+        client._get_evidence_list("job-1")