Yes, keep on top of it. At one point I had a folder and speadsheet showing credits, (use by dates, etc) COVID hit us hard with cancellations. My TA had the actual credits, but there were also many airline and other bits and pieces. I'm using up the last the summer, yes! Most were easy to deal with, extending use-by dates, etc. a few we had to push a little. I think the only thing we just lost was a small AirBNB deposit, the guy was being a jerk about it, it wasn't worth fighting so we let it go,