When unpaid on a construction project, subcontractors and suppliers can use this free form to file a Pennsylvania mechanics lien and secure payment. If you performed work as a contractor or subcontractor and didn't get paid, you can file a mechanic's lien.The Subcontractor has to provide at least thirty (30) days notice before filing a mechanic's lien. The Mechanics' Lien Law requires that a contractor complete the work and then file a mechanics' lien claim within four (4) months of completion of the work. Subcontractors and suppliers must serve the owner with preliminary notice of intent to lien within five months after you complete. 1. Who May Have A Lien? Steps the City will take to ensure that people pay bills and taxes. Includes both enforcement measures and ways to pay outstanding judgment. Who May Have A Lien? Fill in the blank Claim of Mechanics Lien form formatted to comply with all Pennsylvania recording and content requirements.