What is the difference between a simple contract and a deed? Documents are most commonly executed as simple contracts. A contract is made binding on the date that both parties intend that it is to come into effect, which is typically evidenced by both parties signing the agreement. There is no requirement for the signature to be witnessed. Simple contracts have a statutory "limitation period" of six years. A deed is a written document which is executed with the necessary formality (that is, more than a simple signature), and by which an interest, right or property passes or is confirmed, or an obligation binding on some person is created or confirmed. Deeds are generally enforceable despite any lack of consideration. It includes a summary of when a written contract may be necessary, the main differences between simple contracts and deeds, those transactions for which a deed is required, the legal formalities for creating a valid deed and the procedure to follow when exchanging executed documents by virtual means.