N.Y. Comp. Codes R. & Regs. tit. 22, § 205.42
(a) A submission by a support collection unit pursuant to section 413 of the Family Court Act for adjustment of a child support order shall include the following, which shall be submitted on forms promulgated by the Chief Administrator of the Courts:
(3) a notice to the parties of the proposed adjusted order and of the rights of the parties, including the addresses of the court and the support collection unit.
The documents set forth in this subdivision shall be filed with the clerk of the court within 10 days of mailing to the parties, together with an affidavit of service of these documents upon the parties.