21 Pa. Stat. § 269.1
Whenever heretofore any land purchased by the county commissioners of any county for the use of a county at a county treasurer's sale held for the purpose of securing the payment of delinquent taxes which were assessed and levied against such land has been sold by the county commissioners in accordance with the law governing the sale of such land, and the county commissioners in pursuance of such sale executed a deed for said lands, and the acknowledgment of such deed by the county commissioners was defective in any respect, or where the acknowledgment was not taken in open court or before a Justice of the Peace, such sale and such deed shall not be invalidated by reason of such defective acknowledgment, or by reason of the fact that such deed was not acknowledged in open court, or before a Justice of the Peace if in all other respects the laws relating to the holding of such sale were fully complied with and the deed was in fact acknowledged before any officer duly authorized by law to take acknowledgments; and all such commissioners' sales and commissioners' deeds are hereby ratified, confirmed and validated and the title to any such land purchased by any person at such commissioners' sale, and the deed executed and acknowledged to such purchaser is hereby declared to be as valid as if such deed had been properly acknowledged in full conformity with the law relating thereto.
21 P.S. § 269.1