Written service agreements are generally more necessary when contractual terms become more complex or need to be clarified. The ownership of the address of the materials. The best practice is to determine which party retains ownership rights to materials manufactured during the employment contract. The rights may be retained by the service provider or exclusively granted to the client according to the contractual agreement. Identify the customer and the service provider. Please provide contact information for both parties. For cloud-based service providers, IT services may include receiving and storing customers` personal and business data. If the systems fail, this could have serious consequences on the customer`s business relationships.