diff --git a/charger/ocpp/connector_core.go b/charger/ocpp/connector_core.go
index 70796fd27d..8dec3b6003 100644
--- a/charger/ocpp/connector_core.go
+++ b/charger/ocpp/connector_core.go
@@ -74,10 +74,10 @@ func (conn *Connector) StartTransaction(request *core.StartTransactionRequest) (
 	defer conn.mu.Unlock()
 
 	// expired request
-	if request.Timestamp != nil && conn.clock.Since(request.Timestamp.Time) < transactionExpiry {
+	if request.Timestamp != nil && conn.clock.Since(request.Timestamp.Time) > transactionExpiry {
 		res := &core.StartTransactionConfirmation{
 			IdTagInfo: &types.IdTagInfo{
-				Status: types.AuthorizationStatusExpired,
+				Status: types.AuthorizationStatusExpired, // reject
 			},
 		}
 
@@ -105,7 +105,7 @@ func (conn *Connector) StopTransaction(request *core.StopTransactionRequest) (*c
 	if request.Timestamp != nil && conn.clock.Since(request.Timestamp.Time) > transactionExpiry {
 		res := &core.StopTransactionConfirmation{
 			IdTagInfo: &types.IdTagInfo{
-				Status: types.AuthorizationStatusExpired, // accept
+				Status: types.AuthorizationStatusExpired, // reject
 			},
 		}