New York Consolidated Laws, Domestic Relations Law - DOM § 240-b. Order of support by parent

When the court makes an order of support pursuant to section two hundred forty of this article, and where permitted under federal law and where the record of the proceedings contains such information, the court shall require the social security number of such parent to be affixed to such order; provided, however, that no such order shall be invalid because of the omission of such number. Where the record of the proceedings contains such information, such order shall also include on its face the name and address of the employer, if any, of the person chargeable with support provided, however, that failure to comply with this requirement shall not invalidate such order. Where the order of child support or combined child and spouse  1 support is made on behalf of persons in receipt of public assistance or in receipt of services pursuant to section one hundred eleven-g of the social services law, the court shall require each party to provide, and update upon any change, the following information to the court by reporting such change to the support collection unit designated by the appropriate social services district: social security number, residential and mailing addresses, telephone number, driver's license number; and name, address and telephone number of the parties' employers. Due process requirements for notice and service of process for subsequent hearings are met, with respect to such party, upon sending written notice by first class mail to the most recent residential address on record with the support collection unit; or by sending by first class mail written notice to the most recent employer address on record with the support collection unit, if a true copy thereof also is sent by first class mail to the most recent residential address on record with the support collection unit. Any such order issued on or after the first day of October, nineteen hundred ninety-nine shall also include, where available, the social security number of each child on whose behalf support has been ordered.