A tip or gratuity is money given by a customer to an employee for service provided to the customer.  The tip or gratuity may be given to the employee in the form of cash, check, credit card, or any other form of payment.

A service charge is presumed to be a tip or gratuity.  It must therefore be given to the employee who provided the service.

In fact, any charge that the customer pays in addition to charges for food, drinks, lodging, or other specified goods or services is presumed to be a tip and must be given to the employee who provided the service.