We had a prefab addition put on our current home . We contracted and paid in full the agreed amount for the completed addition with a company known as RDA Modular Homes. We are getting ready to sell the property and our realtor brought to our attention a contractors lien on the deed. We do not recall receiving any notification of the lien. We believe that the lien was placed on the property by one of the subcontractors of RDA Modular Homes. One question I have is it legal to apply a contractor's lien against a property for services that I paid RDA Modular Homes in full for? My second question is how many times can I be held liable to pay for the same service.