These sample forms may be useful when filing documents for the civil and family courts. If you have any questions, consult an attorney.A Pennsylvania residential purchase agreement establishes a legal arrangement between a buyer and a seller in a real estate transaction. Create a document that outlines the agreement, including the type and amount of loan, the assets included in the mortgaged, and the terms of the agreement. In the form attached hereto as Exhibit "D". Mortgage Loans under the Agreement.