A tax warrant is equivalent to a civil judgment against you, and protects New York State's interests and priority in the collection of outstanding tax debt. To check if there are any liens, get your section, block and lot number off your most current tax bill and visit the County Clerk's Office.The form must be filled out and presented to the County Clerk to be endorsed. In NY, the tax lien foreclosure procedure is very similar to a mortgage foreclosure in that first, a summons and complaint is filed,. Plaintiff states that he is in the business of purchasing tax liens at public auction. Then the tax lien holder can seek to obtain a tax deed from the Nassau County treasurer.