Pennsylvania Statutes Title 21 P.S. Deeds and Mortgages § 442. Deeds not so recorded, as evidence

No such deed, which shall remain unrecorded as aforesaid, for the said term of two years, shall be permitted to be given in evidence in any of the courts of this commonwealth, unless proven or acknowledged according to the act to which this is a supplement, or unless proven in the manner in which other instruments of writing are proven, by subscribing witnesses or proof of handwriting, or unless, the actual possession of the land has accompanied the said deed.