diff --git a/backend/epc_client/epc_client_service.py b/backend/epc_client/epc_client_service.py
index 86caeea3..72dbf142 100644
--- a/backend/epc_client/epc_client_service.py
+++ b/backend/epc_client/epc_client_service.py
@@ -47,8 +47,14 @@ class EpcClientService:
         latest = max(results, key=lambda r: r.registration_date)
         return self.get_by_certificate_number(latest.certificate_number)
 
+    @staticmethod
+    def _normalise_postcode(postcode: str) -> str:
+        """Return the postcode with all spaces removed and uppercased."""
+        return postcode.replace(" ", "").upper()
+
     def search_by_postcode(self, postcode: str) -> list[EpcSearchResult]:
-        return call_with_retry(lambda: self._search(postcode=postcode))
+        normalised = self._normalise_postcode(postcode)
+        return call_with_retry(lambda: self._search(postcode=normalised))
 
     # ------------------------------------------------------------------
     # Private helperEpcRateLimpolarss