diff --git a/cmd/clef/main.go b/cmd/clef/main.go
index dde4ae853f..ca564e02f0 100644
--- a/cmd/clef/main.go
+++ b/cmd/clef/main.go
@@ -1031,6 +1031,15 @@ func testExternalUI(api *core.SignerAPI) {
 		api.List(context.WithValue(ctx, "Origin", "origin.com"))
 		expectResponse("metadata - origin", "Did you see origin (origin.com)? [yes/no] ", "yes")
 	}
+	{ // SIWE
+		api.UI.ShowInfo("Please reject SIWE request")
+		time.Sleep(delay)
+		req := core.SIWERequest{
+			Domain: "foo",
+		}
+		_, err := api.ApproveSIWE(ctx, req, "some_inc_signature")
+		expectDeny("siwe", err)
+	}
 
 	for _, e := range errs {
 		log.Error(e)
diff --git a/signer/core/api.go b/signer/core/api.go
index 46181cafae..a59d234e68 100644
--- a/signer/core/api.go
+++ b/signer/core/api.go
@@ -320,12 +320,12 @@ func (r *SIWERequest) Verify(signature string) (bool, error) {
 	}
 	msg, err := siwe.InitMessage(r.Domain, r.Address, r.Uri, r.Nonce, additionalParameters)
 	if err != nil {
-		return false, err
+		return false, ErrRequestDenied
 	}
 
 	key, err := msg.Verify(signature, nil, nil, nil)
 	if err != nil {
-		return false, nil
+		return false, ErrRequestDenied
 	}
 	return key != nil, nil
 }