Middlesex County Recorder Mechanics Lien Filing. File your New Jersey Mechanics Lien in Middlesex County without any hassle.What is a Mechanic's Lien? A mechanic lien allows a contractor (and others) to file a lien for unpaid work performed on real property. The person who purchased the lien will receive a legal document referred to as a "tax certificate" which must be recorded with the Middlesex County Clerk. Liens come in many forms but look for any entries with a document type like LIEN, ATTACHMENT, EXECUTION, or TAKING then read the document. A lien reduction involves negotiating with lienholders to decrease the amount they're entitled to recover from your settlement or judgment. A lien is a legal claim against the property of a debtor in case they fail to fulfill the terms of a contract or some other financial obligation. Lien Holder Approval means that the seller must, get an "ok" from the lien holder to sell the property for the terms and conditions set forth in the contract. This post addresses the process for filing a construction lien in New Jersey against private residential property.