suretysur·e·ty /ˈʃɔːrətiˈʃʊr-/ noun [countableC, uncountableU]LAW1a person who promises to appear in court, pay a debt etc if someone else fails to do soThe use of individual sureties grew sharply as contractors found it increasingly difficult to get insurance.
He had acted as surety for both companies when they borrowed to finance the projects.
2an amount of money or other things of value someone gives to make sure someone else will appear in court, pay a debt etcHe was allowed out of custody with sureties totalling £12,000.
a third party entering into acontract of surety