A counterparty (sometimes contraparty) is a legal entity, unincorporated entity, or collection of entities to which an exposure to financial risk might exist. The word became widely used in the 1980s, particularly at the time of the Basel I in 1988.Well-drafted contracts usually attempt to spell out in explicit detail what each counterparty's rights and obligations are in every conceivable circumstance, though there are limits. There are general provisions for how counterparties are treated under the law, and (at least in common law legal systems) there are many legal precedents that shape the common law.