A negotiable instrument is a document guaranteeing the payment of a specific amount of money, either on demand, or at a set time, with the payer named on the document. More specifically, it is a document contemplated by or consisting of a contract, which promises the payment of money without condition, which may be paid either on demand or at a future date. The term can have different meanings, depending on what law is being applied and what country it is used in and what context it is used in.