A joint marketing agreement is a legal contract that governs the relationship between two or more companies to collaborate in advertising, promotion and sales. This joint marketing agreement template will help establish a formal relationship between two parties who wish to engage in joint marketing efforts.Understand the goals and objectives of each party involved in the marketing agreement. Identify the roles and responsibilities of each party. A joint marketing agreement or similar agreement is necessary in order to set forth the rules of the road for the parties' relationship. Filed with the Securities and Exchange Commission. The sole purpose of this Joint-Marketing Agreement shall be to engage in the business of soliciting. Joint marketing agreements are contracts that allow companies to market for each other and share audiences. Learn how to manage these agreements. This free joint marketing agreement template will help to establish a formal relationship between parties who wish to engage in the venture.