Tennessee Code Title 50. Employer and Employee § 50-2-107

(a)(1) If a business, including a private club, lounge, bar or restaurant, includes on the bill presented to and paid by a customer, member or patron an automatic percentage or specific dollar amount denominated as a service charge, tip, gratuity, or otherwise, which amount is customarily assumed to be intended for the employee or employees who have served the customer, member or patron, that amount shall be paid over to or distributed among the employee or employees who have rendered that service. The payment shall be made at the close of business on the day the amount is received or at the time the employee is regularly paid, or, in the case of a bill for which credit is extended to a customer, member or patron, payment shall be made at the close of business on the day the amount is collected or on the first day the employee is regularly paid occurring after the amount is collected.

(2) The payment shall not be reduced, docked or otherwise diminished to penalize an employee for any actions in connection with the employee's employment, if it is derived from a mandatory service charge or tip collected from customers, members or patrons.