21 Pa. Stat. § 263
All the deeds and conveyances in due forms for lands within this state, which purport to have been executed and acknowledged or proved without the limits of this state, and which have been recorded in any county of this state in which any part of the lands conveyed lie for a period of thirty years previous to the passage of this act, notwithstanding such deeds and conveyances shall not have been acknowledged or proved at the time they may have respectively recorded according to the requirements of the then existing laws of this commonwealth in relation to the recording of deeds, shall be received and admitted in evidence in like manner and with effect as if the same had been duly acknowledged or proved at the time of their being respectively executed, or previous to their being recorded.
21 P.S. § 263