New York Consolidated Laws, Civil Practice Law and Rules - CVP § 2507. Justification of surety

(a) Motion to justify.  Within ten days after service of notice of exception, the surety excepted to or the person upon whose behalf the undertaking was given shall move to justify, upon notice to the adverse party and to the sheriff if he was served with the undertaking.  The surety shall be present upon the hearing of such motion to be examined under oath.  If the court find the surety sufficient, it shall make an appropriate indorsement on the undertaking.  A certificate of qualification issued pursuant to subsections (b), (c) and (d) of section one thousand one hundred eleven of the insurance law shall be accepted in lieu of a justification.

(b) Failure to justify.  If a motion to justify is not made within ten days after the notice of exception is served, the undertaking shall then be without effect, except as provided in this subdivision.  Unless otherwise provided by order of court, a surety on an undertaking excepted to and not justified shall remain liable until a new undertaking is given and allowed, but the original undertaking shall be otherwise without effect.