Notice of Lending forms can be purchased at stationery stores that carry legal forms. We have updated our forms.Please make sure you download the latest version. A mechanic's lien is a legal claim on property for unpaid work or supplies, appearing as a debt on the title, which motivates the owner to pay you. Subcontractors and suppliers (known in this form as "Tiered Parties") can use this Affidavit of Lien form to file a mechanics lien and get paid. The amount is due from . (Name of General Contractor). To file a notice of lien, you must complete the Public Improvement Lien Form. You must also sign and notarize both the Lien Form and the Affidavit of Service. This article will explain the steps you must take to correctly file and enforce a mechanic's lien in Oklahoma.