Wikileaks offers a variety of Scientology documents not previously seen on the Internet. included in their collection is a six page contract which one has to sign in order to participate in Scientology religious services.
Almost as interesting as the document is the description given of it. For example, one of the reasons given for the importance of this document is "it demonstrates the control [the Church] exerts on its members." Certainly there are a lot of expectations in this contract. On the other hand, it's spelled out in a contract. If you sign this thing, you should have a decent picture of what you're getting into. One of the clauses flat out says, for example, that the member will not sue the Church, and if they do, "I intend for the submission of this Contract to the presiding judicial officer to be a complete and sufficient basis for the immediate dismissal of any and all such proceedings."
So...you've been warned. In black and white.