Marketing and Brand Development Services. A joint development and marketing agreement is a contract between two parties that establishes a development and marketing relationship between them.Firms must include at least two examples of brand development and two examples of a marketing campaign that was executed. The City of Franklin, Virginia intends to enter into a contract from October 15, 2022 through June. For signage at this stage. Production costs should be focused on supporting the marketing campaign. Marketing agency legal documents include terms and tasks from a marketing agency towards its clients, covering various aspects such as the service, fees, etc.