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. Please complete the form below to create the Joint Marketing Agreement Template. All fields must be filled out to ensure a clear and comprehensive agreement. A joint development and marketing agreement is a contract between two parties that establishes a development and marketing relationship between them. Edit, sign, and share Co-Marketing Agreement online. No need to install software, just go to DocHub, and sign up instantly and for free. It is possible for the parties in a joint venture to create a new, separate corporation, limited liability company, or partnership. This free joint marketing agreement template will help to establish a formal relationship between parties who wish to engage in the venture.