12 Pa.C.S. § 6314: Acknowledgment of payment in full.

Upon a buyer's request and after the payment of all sums for which the buyer is obligated under a closed-end credit agreement or an open-end credit agreement, the holder shall deliver or mail to the buyer at the buyer's last known address an instrument that:

(1) Acknowledges that the obligation of the buyer under the agreement has been paid in full.

(2) Releases all security in the goods under the agreement.