diff --git a/backend/core/src/Core.API/ResponseHandling/SignatureVerificationMiddleware.cs b/backend/core/src/Core.API/ResponseHandling/SignatureVerificationMiddleware.cs
index a39b88d..7745fcd 100644
--- a/backend/core/src/Core.API/ResponseHandling/SignatureVerificationMiddleware.cs
+++ b/backend/core/src/Core.API/ResponseHandling/SignatureVerificationMiddleware.cs
@@ -130,8 +130,8 @@ public async Task Invoke(HttpContext context)
                 }
                 else
                 {
-                    _logger.LogError("Invalid signature");
-                    var customErrors = new CustomErrors(new CustomError("Forbidden", "Invalid signature", "x-signature"));
+                    _logger.LogError("Timestamp outdated");
+                    var customErrors = new CustomErrors(new CustomError("Forbidden", "Invalid timestamp", "timestamp"));
                     await WriteCustomErrors(context.Response, customErrors, (int)HttpStatusCode.Forbidden);
                 }
             }
@@ -183,4 +183,4 @@ public static void ConfigureSignatureVerificationMiddleware(this IApplicationBui
             app.UseMiddleware<SignatureVerificationMiddleware>();
         }
     }
-}
\ No newline at end of file
+}