(a) The holder of a retail installment contract who gives the retail buyer or the buyer's designee outstanding balance information relating to the contract is bound by that information and shall honor that information for a reasonable time.
(b) If the retail buyer or the buyer's designee tenders to the holder as payment in full an amount derived from that outstanding balance information, the holder shall:
(1) accept the amount as payment in full; and
(2) release the holder's lien against the motor vehicle within a reasonable time not later than the 10th day after the date on which the amount is tendered.
(c) A retail seller must pay in full the outstanding balance of a vehicle traded in not later than the 25th day after the date that:
(1) the retail installment contract is signed by the retail buyer and the retail buyer receives delivery of the motor vehicle; and
(2) the retail seller receives delivery of the motor vehicle traded in and the necessary and appropriate documents to transfer title from the buyer.
Official text of the Texas Finance Code as published by the Texas Legislative Council.