NYSentencing

CPL § 410.30  Declaration of delinquency.
  If  at  any  time  during  the period of a sentence of probation or of
conditional discharge the court has reasonable cause to believe that the
defendant  has  violated a condition of the sentence, it may declare the
defendant delinquent and file  a  written  declaration  of  delinquency.
Upon   such   filing,  the  court  must  promptly  take  reasonable  and
appropriate action to cause the defendant to appear before  it  for  the
purpose of enabling the court to make a final determination with respect
to the alleged delinquency.