You control your signature! Always read, or have someone else you trust read, any business or legal document you are given to sign.  Do not sign the document if you do not understand what it says or what impact it will have on you, without taking it to a lawyer to review on your behalf.  Never sign a document under pressure (i.e. “If you don’t sign now the deal is going away.”)  Always obtain a copy of the fully signed document to take away with you.