21 Pa. Stat. § 151
The recorders of deeds should have authority to take the acknowledgment and proof of the execution of any deed, mortgage or other conveyance of any lands, tenements, or hereditaments, lying or being in the county for which they are respectively appointed as recorder of deeds, or within every city, district or part thereof, or for any contract, letter of attorney, or any other writing, under seal, to be used or recorded within their respective counties; and such acknowledgment or proof, taken or made in the manner directed by the laws of this state, and certified by the said recorder, under his hand and seal of office, which certificate shall be endorsed or annexed to said deed or instrument aforesaid, shall have the same force and effect, and be as good and available in law, for all purposes, as if the same had been made or taken before any judge of the supreme court, or president or associate judge of any of the courts of common pleas within this commonwealth.
21 P.S. § 151