After a contract is awarded, the county will issue a purchase order. A purchase order is required for almost all purchases.A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. Purchaser agrees to use diligent efforts to obtain said approval and shall apply for the mortgage loan within business days after the Seller has accepted this. All blank spaces in the Proposal Form shall be entered via data entry using supplied electronic copies of documents. The paper copies of the submitted. Signed purchase agreement required at time of application. How do I fill this out?