75 Pa. C.S. § 7311
The person in charge of any garage or repair shop in which a vehicle of unknown ownership has been left for a period of 15 consecutive days or, in the case of repair or storage, 15 consecutive days following the completion of repairs or storage agreement without being removed by the owner or any other person duly authorized to remove the vehicle shall report to the department within 24 hours of the expiration of the 15-day period giving the make, vehicle identification number, registration plate number and the name and address of the person abandoning the vehicle if known. Upon receipt of the report the department shall make a distinctive record of the report and issue a private property abandoned vehicle information report under section 7311.1 (relating to reports by private property owners of abandoned vehicles) to the garage keeper to complete and file with the police.
75 Pa.C.S. § 7311