12 Pa.C.S. § 6354: Corrections.

(a) General rule.--Notwithstanding the provisions of this chapter and subject to subsection (b), a seller or holder may correct a failure to comply with a provision of this chapter in accordance with this section unless a willful violation has occurred.

(b) Concurrence by buyer.--A correction that will increase the amount owed by the buyer or the amount of a payment is not permitted unless the buyer concurs in writing with the correction.

(c) No liability.--If a seller or holder corrects a violation in accordance with this section, the seller and holder are not subject to penalty under this subchapter.

(d) Delivery.--Within 30 days of the execution of the original closed-end credit agreement or open-end credit agreement by the buyer, a correction may be delivered to the buyer in the form of a corrected copy of the agreement.

(e) Credit.--An amount improperly collected from the buyer shall be:

(1) credited against the indebtedness evidenced by the agreement; or

(2) refunded to the buyer if the debt has already been satisfied.