Tennessee Code Title 65. Public Utilities and Carriers § 65-20-104

(a) It is unlawful for any person, other than the authorized agent of the common carrier issuing the same, to sell or otherwise deal in or offer to sell any railroad, railway, steamship, or steamboat passenger ticket which shows that it was issued and sold below the standard schedule rate under contract with the original purchaser entered upon such ticket and signed by the original purchaser, to the effect that such ticket is nontransferable and void in the hands of any person other than the original purchaser thereof; provided, that nothing in this section nor in § 65-20-103 shall be construed as depriving the original purchaser of a transferable ticket of the right to sell same to a person who will in good faith personally use it in the prosecution of a journey.

(b) It is the duty of every common carrier that shall have sold any ticket or other evidence of the purchaser's right to travel on its line, or any line of which it forms a part, to, if the whole of such ticket be unused, redeem the same, paying the original purchaser thereof, the actual amount for which the ticket was sold; or, if any part of such ticket be unused, to redeem such unused part, paying the original purchaser thereof at a rate which shall be equal to the difference between the price paid for the whole ticket and the price of a ticket between the points for which the ticket was actually used; provided, that such purchaser shall present such unused or partly used ticket for redemption within six (6) months after the date of its issuance, to the officer or agent who shall be authorized or designated by such common carrier to redeem unused or partly used tickets, and the officer shall within fifteen (15) days after the receipt of such ticket redeem the same as hereinbefore provided. Such redemption shall be made without cost of exchange or other expense to the purchaser of the ticket.

(c) A violation of this section is a Class C misdemeanor.