A joint marketing agreement is a legal contract that governs the relationship between two or more companies to collaborate in advertising, promotion and sales. Joint marketing agreements are contracts that allow companies to market for each other and share audiences.Learn how to manage these agreements. In the agreement, you should list the companies involved, what each business does, and any other relevant information about the businesses involved. A. The Parties entered into that certain Amended and Restated Joint Marketing Agreement, dated as of July 1, 2015 ("Original Agreement"). This Joint Powers Agreement ("Agreement" or "JPA") for the Cities Association of Santa Clara. Handwritten forms are hard to read. Complete online, then print. In the event of termination,. Contractor shall deliver to County all documents prepared pursuant to the Agreement, whether complete or incomplete.