I also had a project that was setup via a star's producing partner (which is a slightly safer bet, but still not definitive); however, when a co_financier that I had sent it to called the agent to confirm, the agency denied it and ultimately killed the deal. Agencies and management companies can wield tremendous influence and pressure over celebrities who in most cases are insecure about their careers.
2 _ It should be clearly written in a neat & tidy fashion. The intentions of all concerned needs to be recorded in the document. Before commencing to write you're best to make yourself familiar with the various styles of business letters. 3 _ After all the entities involved in the deal sign the memorandum of understanding, a joint press release should be issued. It sends a very positive message to the stockholders of the businesses involved.