12 Pa.C.S. § 6344: Costs of collection.

A closed-end credit agreement or an open-end credit agreement may provide for payment of actual and reasonable costs of collection only if any of the following occurs:

(1) If the goods are subject to a security interest, the goods are removed from this Commonwealth without the written permission of the holder.

(2) The buyer fails to notify the holder of a change of residence.

(3) The buyer fails to communicate with the holder for a period of 45 days after a default in making payments due under the agreement.