We live in Georgia and transported my car to be repaired by a private mechanic in Wisconsin. He works out of his house and repairs cars as a side business. Dropped off my car and flew back to Atlanta and left my truck and trailer at his house. He does not have a business or company. He quoted me $6,500 to repair the car. When I arrived back to Wisconsin a few weeks later, he stated I owed him $19,000. I told him, I would not pay anything until he details out his work hours and provides receipts for parts purchased. He released my car to me and I loaded up and drove back to Georgia. Thus I have possession of my car. After numerous emails, I paid him $9,000 and will not pay a penny more. He sent me a certified letter stating, he will file a mechanics lien on my car. Is this possible for a mechanic to place a lien without possession of the car in Wisconsin?