I do new construction work. After completing the first portion of my work, I send an invoice for 80%. When the house is nearly finished and just about ready to close, I do my remaining work and submit an invoice for the 20%. Within a week, the house is closed and I may or may not get the remaining balance. The time frame is so short, that if I file lien, I may still have to wait until if/when the new owners ever sell. How can I make sure the tittle company is aware of my balance in enough time to be paid before closing?