To become a vendor with the city, you must complete the vendor self-registration process. It takes the city about two business days to approve the registration.Here, you'll find details about contracting opportunities, vendor qualifications, proposals and how to bid on projects. In order to do business with the State of Arizona, businesses are required to register an account on the Arizona Procurement Portal (APP). To register, go to the Arizona Procurement Portal ("APP") website. Questions. This user manual provides detailed instructions for completing the Qualified Vendor Contract application. How to register as a vendor with the state. • Answers to frequently asked questions. A commissary agreement may still be required within Maricopa County based on the nature of the operation. We're excited to partner with talented artisans like you!