75 Pa.C.S. § 1108: Registration without certificate of title.

If the department is not satisfied as to the ownership of the vehicle or that there are no undisclosed security interests in the vehicle, the department may register the vehicle but shall withhold issuance of a certificate of title until the applicant presents documents reasonably sufficient to satisfy the department as to the ownership by the applicant of the vehicle and that there are no undisclosed security interests in the vehicle.