Please click here to search for Historical Deeds, Chattel Mortgage Book and Feme Sol Trader Offices; for the period 1792-1857. Find out how to record documents such as deeds, mortgages, Military Discharge Papers (DD214), Powers of Attorney, and more.The Sheriff's Office plays many different, yet important roles in the process of mortgage foreclosures. All Allegheny County specific forms and documents listed below are included in your immediate download package: Mortgage Form. Allegheny County Mortgage Form. Our work in the Real Estate department involves preparing and collecting county taxes while serving the taxpayers in a professional and courteous manner. Our work in the Real Estate department involves preparing and collecting county taxes while serving the taxpayers in a professional and courteous manner. Contact Allegheny County Assessment Department at 412-350-4600 with any questions. The agency or authority has the full ownership interest in the real estate transferred. (19). The following forms are available online for print-out purposes only.