Recognisance

n. (Law, Finance) legal promise or obligation; formal agreement made by a person in court before a judge; money pledged as a bond (also recognizance)

In British and American law, the term recognizance is usually employed to describe an obligation of record, entered into before some court or magistrate duly authorized, whereby the party bound acknowledges (recognizes) that s/he owes a personal debt to the government or Crown, with a defeasance, i.e. subject to a condition that the obligation to pay shall be avoided if he shall do some particular act, as if s/he shall appear at the assizes, keep the peace, or the like.
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Noun
1. (law) a security entered into before a court with a condition to perform some act required by law; on failure to perform that act a sum is forfeited
(synonym) recognizance
(hypernym) security, surety
(hyponym) bail, bail bond, bond
(classification) law, jurisprudence

An undertaking before the Court by which a person agrees to comply with a certain condition, eg keep the peace/appear in court. A sum of money is normally pledged to ensure compliance 

recognisance
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