Recently a contractor volunteered to hang cabinets and provide finishing work "at no cost to you" were his words. He reached out now and then to see how our project was going. When I was ready to have the cabinets hung, I asked him if he was still willing to help us. He said yes. He came to our house and worked four days. When he contacted me on the 5th day to say he had one small thing to do, he then said we owed him $2020 for the work he had done. Not once before or during the time he hung the cabinets did he mention a fee or rate he intended to charge. Only when he was 90% done did he tell us he intended to charge us and the amount. Can he place the lien and can it be enforced without any proof?