diff --git a/client/src/cmdhfgallagher.c b/client/src/cmdhfgallagher.c
index f9765f37f..5e653708b 100644
--- a/client/src/cmdhfgallagher.c
+++ b/client/src/cmdhfgallagher.c
@@ -771,7 +771,12 @@ static int hfgal_read_card(uint32_t aid, uint8_t *site_key, bool verbose, bool q
         // Read & decode credentials
         GallagherCredentials_t creds = {0};
         res = hfgal_read_creds_app(&dctx, current_aid, site_key, &creds, verbose);
-        HFGAL_RET_IF_ERR_MAYBE_MSG(res, !quiet, "Failed reading card application credentials");
+        if (res != PM3_SUCCESS && res != HFGAL_AUTH_FAIL)
+            HFGAL_RET_IF_ERR_MAYBE_MSG(res, !quiet, "Failed reading card application credentials");
+        if (res == HFGAL_AUTH_FAIL) {
+            PrintAndLogEx(WARNING, "Invalid site key for AID %06X", current_aid);
+            continue;
+        }
 
         PrintAndLogEx(SUCCESS, "GALLAGHER (AID %06X) - Region: " _GREEN_("%u") ", Facility: " _GREEN_("%u")
                       ", Card No.: " _GREEN_("%u") ", Issue Level: " _GREEN_("%u"), current_aid,
diff --git a/client/src/cmdhfgallagher.h b/client/src/cmdhfgallagher.h
index c4ed31784..087ad9364 100644
--- a/client/src/cmdhfgallagher.h
+++ b/client/src/cmdhfgallagher.h
@@ -40,4 +40,8 @@ int hfgal_diversify_key(uint8_t *site_key, uint8_t *uid, uint8_t uid_len,
 #define HFGAL_RET_IF_ERR_WITH_MSG(res, ...)            if (res != PM3_SUCCESS) {              PrintAndLogEx(ERR, __VA_ARGS__); return res; }
 #define HFGAL_RET_IF_ERR_MAYBE_MSG(res, verbose, ...)  if (res != PM3_SUCCESS) { if (verbose) PrintAndLogEx(ERR, __VA_ARGS__); return res; }
 
+// The response code when an invalid key is used for authentication
+// Returned in /client/src/mifare/desfirecore.c, line 1185 (if DesfireExchangeEx fails)
+#define HFGAL_AUTH_FAIL 7
+
 #endif