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.Vendor contracts are business agreements that help define the terms of the business transactions. These contracts should cover very in-depth details. Creating a contract is simple as uploading a template, completing relevant fields, and adding approvers and signers. What should be included in a vendor contract? This document provides instructions for submitting your contracting documents and carrying out additional steps needed to execute a NYSCA Capital Contract. One signed Agreement is required and applies to customers in your service territory within New York State. Vendor Agreements and participation will be. Use this legal vendor agreement template to ensure that new vendors are aware of the terms of doing business with your organization.