As a dining app, Gourmet Passport does not have any control over the levy of Service Charge. This is a discretionary amount which is often charged by the restaurants, whether or not you are using any offer or scheme. Restaurants will typically mention that they levy a Service Charge at the entrance or on their menu. If you are in doubt please clarify with the restaurant if they levy any Service Charge at the beginning of your meal. There is no link between your usage of Gourmet Passport and the restaurant levying a Service Charge.