Each vendor is to complete their contract bid on the Maryland Works issued template. A contract consists of a legally binding agreement or promise between parties.This video provides a step-by-step guide on how to fill out Maryland's Residential Contract of Sale form. Completed Internal Revenue Service W-9 Form. The Contract window opens and displays the contract form. Several fields will auto-populate with information from your sourcing project. This video provides a step-by-step guide on how to fill out Maryland's Residential Contract of Sale form. The agreement must be voluntary, and the parties need to be mentally competent. The Maryland Real Estate Purchase Agreement form serves as a written contract for a property transaction. Obtain from the prospective vendor an estimate as to how long it will take to complete the contract. 6.