Are you signing a new contract or renewing any then it is always necessary to read it first before signing it. There are chances of fraud from anyone even from your own person.This is an era of fraud so you must be aware of these facts. Make sure that the contract has the contents that you agree upon. Consent of signing parties are always necessary to make the contract valid. There maybe words that may void your contract easily. Contractor maybe free of responsibilities so it is necessary to proofread. Contract must be made valid by the lawyer otherwise documents can be regarded as fake. There must be someone as a observer of the event and the observer must agree on the documents made.