These forms and instructions are available in the General Clerk's Office, Room 108, in the Nassau County. Common application for Public Assistance, Child Care in Lieu of Public Assistance, the Supplemental Nutrition Assistance Program (SNAP), Medicaid and SNAP.You have to first obtain a Marriage License and then have a Marriage Ceremony in the City Clerk's Office or a Marriage Ceremony outside the City Clerk's Office. A spouse can file a petition in New York Family Court for the other spouse to pay spousal support even if they have not yet filed for divorce. 1. Fill out a child support modification petition. 2. File the petition with the Family Court that most recently established your order. 3. The best way to avoid paying alimony in the event of a divorce is to sign a prenuptial or postnuptial agreement. Schedule an initial consultation with our child support lawyers in Nassau County today to discuss your case in more detail. Call (516) 908-8842 or fill out our online contact form to learn more. Eligibility for spousal support in New York.