Definitions of surety
a person who takes responsibility for another person performing some obligation, appearing in court or paying back money that they owe etc
The majority of the pre-trial detainees in the H ward were people who couldn't find sureties to secure their release.
money given to help guarantee that another person will perform some obligation, appear in court or pay back money that they owe etc
He was released on his own bail of £1,000 and a cash surety of £10,000 to be lodged with Belfast Crown court.