recognizance
recognisance, / rɪˈkɔgnɪzns; rɪ`kɑɡnɪzəns/ n (law 律)
(a) formal promise made to a court or magistrate that one will observe certain conditions (eg keep the peace), appear when summoned or pay a debt 具结; 保证书
enter into recognizances (for sb) （为某人）具结
bail in one's own recognizance of 500 自付500英镑保证金获得保释
be released on one's own recognizance 经本人具结获释.
(b) sum of money pledged as a guarantee that this promise will be kept （交付法院的）保证金.