Must I fill out all these forms just to change the name of my Deed? Form must be filled out and notarized at the time of filing.The Nassau County Clerk's Office preserves and protects land records and provides a wide range of services to the public in a professional and courteous manner. 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. Looking to file a mechanics lien in Nassau County? Find the information you need to record your lien successfully with the Nassau County Clerk here. Nathanson Law Firm is dedicated to providing our clients with legal services in Property Law and LandlordTenant cases. Next, provide a description of the real estate involved in the suit. D Assignment of Mortgage.