For more details about open contracting opportunities, please register or login to the City's iSupplier Portal. All businesses that want to contract with the City must register with iSupplier, to receive bid notifications, to apply for local business certification.This form is intended for use with the. To apply for a Purchasing Card, fill out the Purchase Card Application and send to Accounts Payable. This guide will walk you through the Pay a Vendor Form portion of the new Ed Fund Expense Process. We also have a video tutorial on how to submit a housing contract available for your convenience. In real estate, a purchase agreement is a binding contract between a buyer and seller that outlines the details of a home sale transaction. The first step to buying a home is to understand your buying power and establish a price range.