An event planning contract expresses a business deal's lawful terms and conditions between a client, event planner, organizer, and merchant or service provider. How to register as an event promoter who contracts with venues, performers, or others to produce events at special assembly occupancies.Use this simple event planner contract template to create a legally binding agreement that outlines the specifics of the event to be planned. This attorney-drafted service agreement template is intended to help you quickly and confidently create contracts, and includes built-in legal clauses. An event agreement is a contract between an event planner and a client that outlines the terms and conditions of the pair's relationship. Hire the best freelance Event Planners near Philadelphia, PA on Upworkâ„¢, the world's top freelancing website. An event planning contract is a legal agreement between you and the client for the services you would offer. Let's connect and make your vision a reality! This part of the event planning agreement provides details regarding the mailing address of the parties. An event planner contract is used to establish the working relationship between an event planner and their client.