The Tax Department has a standard covendor agreement that it will send to a supplier that requests to be treated as a covendor. Find forms for vendors and State agencies related to vendor responsibility.What should be included in a vendor contract? As a vendor or contractor, you must register online to do business with the City through the Payee Information Portal (PIP). Creating a contract is simple as uploading a template, completing relevant fields, and adding approvers and signers. We'll help you craft the best vendor contract agreement for your specific needs, and help you manage that relationship as long as you need it. Use this legal vendor agreement template to ensure that new vendors are aware of the terms of doing business with your organization. Vendor contracts are business agreements that help define the terms of the business transactions. These contracts should cover very in-depth details. A General Vendor license is required for anyone that will sell, lease, or offer to sell or lease goods or services in a public space that is not a store.