diff --git a/pkg/morph/event/listener.go b/pkg/morph/event/listener.go
index 405165702..ca5031415 100644
--- a/pkg/morph/event/listener.go
+++ b/pkg/morph/event/listener.go
@@ -365,11 +365,14 @@ func (l *listener) parseAndHandleNotary(nr *result.NotaryRequestEvent) {
 	// prepare the notary event
 	notaryEvent, err := l.notaryEventsPreparator.Prepare(nr.NotaryRequest)
 	if err != nil {
+		var expErr *ExpiredTXError
 		switch {
 		case errors.Is(err, ErrTXAlreadyHandled):
-		case errors.Is(err, ErrMainTXExpired):
+		case errors.As(err, &expErr):
 			l.log.Warn(logs.EventSkipExpiredMainTXNotaryEvent,
 				zap.String("error", err.Error()),
+				zap.Uint32("current_block_height", expErr.CurrentBlockHeight),
+				zap.Uint32("fallback_tx_not_valid_before_height", expErr.FallbackTXNotValidBeforeHeight),
 			)
 		default:
 			l.log.Warn(logs.EventCouldNotPrepareAndValidateNotaryEvent,
diff --git a/pkg/morph/event/notary_preparator.go b/pkg/morph/event/notary_preparator.go
index a8b7376fa..298a6d574 100644
--- a/pkg/morph/event/notary_preparator.go
+++ b/pkg/morph/event/notary_preparator.go
@@ -39,11 +39,18 @@ var (
 
 	// ErrTXAlreadyHandled is returned if received TX has already been signed.
 	ErrTXAlreadyHandled = errors.New("received main tx has already been handled")
-
-	// ErrMainTXExpired is returned if received fallback TX is already valid.
-	ErrMainTXExpired = errors.New("received main tx has expired")
 )
 
+// ExpiredTXError is returned if received fallback TX is already valid.
+type ExpiredTXError struct {
+	CurrentBlockHeight             uint32
+	FallbackTXNotValidBeforeHeight uint32
+}
+
+func (e *ExpiredTXError) Error() string {
+	return "received main tx has expired"
+}
+
 // BlockCounter must return block count of the network
 // from which notary requests are received.
 type BlockCounter interface {
@@ -308,7 +315,10 @@ func (p Preparator) validateExpiration(fbTX *transaction.Transaction) error {
 	}
 
 	if currBlock >= nvb.Height {
-		return ErrMainTXExpired
+		return &ExpiredTXError{
+			CurrentBlockHeight:             currBlock,
+			FallbackTXNotValidBeforeHeight: nvb.Height,
+		}
 	}
 
 	return nil
diff --git a/pkg/morph/event/notary_preparator_test.go b/pkg/morph/event/notary_preparator_test.go
index b2e46890b..8da9d868a 100644
--- a/pkg/morph/event/notary_preparator_test.go
+++ b/pkg/morph/event/notary_preparator_test.go
@@ -331,7 +331,7 @@ func TestPrepare_IncorrectNR(t *testing.T) {
 					{},
 				},
 			},
-			expErr: ErrMainTXExpired,
+			expErr: &ExpiredTXError{},
 		},
 		{
 			name: "incorrect invoker TX Alphabet witness",