The contractor filed n invalid mechanic's lien to my property. I had filed a complaint to the city against the contractor prior to this for substandard work and for not complying with the building code laws of having licensed contractors and permits. So I requested end of contract and would not pay any further. He did not sent the mechanic's lien notice letter addressed to me, but sent it to my spouse, whose name is not on the property. The letter was not sent by registered mail and was not sent within 30 days of filing the mechanics lien. He had lost his general contractor license at the city. Since then the contractor has deceased.
In Ohio, a property owner such as yourself can serve the contractor with a document known as a notice to commence suit. Then if the contractor doesn't commence a lawsuit (which doesn't seem likely) you can record that fact with the recorder, and any title company will treat that as a discharge of the lien.