Yeah, I just wanted to be sure to include that for your consideration.On the proof: Dive destinations or charters I've used have asked when the last dive was done, and some ask about total dive count/deepest dive. However, they've always taken my word for it. I've yet to encounter one that asked for a logbook. (And if they did, I'm not sure what I'd do: I log in an Excel spreadsheet and don't get anybody to sign off.)