I do nt want to give a law lesson here but from my profesional experience I can tell you that you better wake up early if you intend to prove that you did not consent in whole to what appears in a document that you have signed Further than that signature also gives a somewhat fair idea of the concept notably pointing out that a signature is evidence of the provenance identity of the document signing a document is proof that it comes from you personnaly what does not mean that it can not also come from other persons as well For instance you can have 3 10 20 parties to a contract all can be held personnaly to the whole unless stated otherwise