diff --git a/relying_party/relying_party/visione_views.py b/relying_party/relying_party/visione_views.py
index 1ea4043..7c762ea 100644
--- a/relying_party/relying_party/visione_views.py
+++ b/relying_party/relying_party/visione_views.py
@@ -67,8 +67,25 @@ class VisioneCompleteView(View):
         )
         fiscal_code = _normalize_fiscal_code(fiscal_code)
         subject = user_attrs.get("sub") or user_attrs.get("username")
-        if not state or not issuer or not subject or not fiscal_code:
-            return HttpResponseBadRequest("Missing Visione auth session or user attributes")
+        missing = []
+        if not state:
+            missing.append("visione_state")
+        if not issuer:
+            missing.append("visione_provider_issuer")
+        if not subject:
+            missing.append("subject")
+        if not fiscal_code:
+            missing.append("fiscal_code")
+        if missing:
+            logger.warning(
+                "Visione complete missing required data missing=%s session_keys=%s user_attr_keys=%s",
+                ",".join(missing),
+                sorted(request.session.keys()),
+                sorted(user_attrs.keys()) if isinstance(user_attrs, dict) else [],
+            )
+            return HttpResponseBadRequest(
+                f"Missing Visione auth session or user attributes: {', '.join(missing)}"
+            )
 
         payload = {
             "state": state,
diff --git a/vendor/spid-cie-oidc-django/spid_cie_oidc/relying_party/settings.py b/vendor/spid-cie-oidc-django/spid_cie_oidc/relying_party/settings.py
index 77e97c2..641a212 100644
--- a/vendor/spid-cie-oidc-django/spid_cie_oidc/relying_party/settings.py
+++ b/vendor/spid-cie-oidc-django/spid_cie_oidc/relying_party/settings.py
@@ -101,7 +101,8 @@ CIE_REQUESTED_CLAIMS = getattr(
             "given_name": None,
             "family_name": None,
             "email": None,
-            "fiscal_number": None
+            "fiscal_number": None,
+            "https://attributes.eid.gov.it/fiscal_number": None,
         },
     },
 )