I think whenever something is unexpected in a positive way, you should thank them. No expectations. Just a simple email of "thanks for paying the car insurance thru the end of the year. I really appreciate it!"
3 kids BD 12/15/13 (IDKIILY. ) Rope dropped Cirque du Soleil style D final 9-9-14 "Some people are born on 3rd base and go through life thinking they hit a triple." Barry Switzer