69 Pa. Stat. § 2102
A seller or holder may not accelerate the maturity of a retail installment contract, commence any legal action or repossess without legal process unless the buyer is in default and unless the seller or holder shall provide the buyer with notice, sent by certified mail, to the buyer's last known address or delivered personally to the residence of the buyer, informing the buyer (1) of his right to cure the default upon payment of the amount in default plus delinquency or deferral charges within twenty-one (21) days of the date of receipt of such notice, (2) the name, address and telephone number of the seller or holder, (3) total amount due, including amount of delinquency charges, (4) exact date by which the amount due must be paid, (5) name, address and telephone number of the person to whom payment must be made, and (6) other performance necessary to cure a default arising from other than nonpayment herein and the buyer is given the rights so specified. The seller or holder shall not be required to provide such notice more than once in any twelve (12) month period. The act of curing a default restores to the buyer his rights under the retail installment contract as though no default had occurred.
69 P.S. § 2102