No information is available for this page. If you are suing an individual for services rendered, you must mail a Demand Letter to the.Search Enter your name in the Search for Individual box on our Search for Lost Money page. Learn how to file a small claims case in Nassau County. Get details on court locations, filing procedures, and preparing for your hearing. Fill this form out completely in English. Most court deposits must be filed through the Nassau County Clerk, who then deposit the funds with the Treasurer. Upon arriving in Nassau, everyone must fill out and sign an immigration form, keeping a portion of the card in hand until departing. Visit any Post Office. Complete the relevant application form.