How do I file my Separation Agreement? The court has placed the most commonly used forms on line as a resource.Please be advised that the forms detailed below are intended to be a guide. Generally, to be separated in Nassau and Suffolk counties in New York, married persons must become parties to a "separation agreement. Alternatively, co-owners can choose to sell the property voluntarily without going to court, provided they have a well-drafted settlement agreement in place. Intheblanks form required for any matter originating and electronically filed in Supreme or Surrogate's Courts in Richmond County. Create separation agreements with Schlissel Law Firm. Define right, responsibilities, and support during separation. A divorce attorney with vast experience preparing and litigating divorces in Nassau County and Suffolk County courtrooms. An attorney can negotiate a partition agreement out of court.