Define verification.

I think AC writes down info on my flight when I use the MLL, would that be sufficient verification if it were a RCC and UA billed AC for it? Nothing proves I was actually there, they could get all that information from the flight manifest. At some point, partners (they're not just suppliers, after all) have to trust each other.

OTOH, at the TWA lounge in LAX/T3 (before the AC-CP and AA-TWA mergers), I had to write down my CP number, the flight info, and sign it, so they could bill CP. Still didn't prove I was there, although in that case TWA wouldn't have the info since it wasn't their flight. But I doubt anyone actually audited it.

I've worked in places where you were supposed to write down personal LD calls made on company phones. Then when the phone bill came, someone went around and checked every call that was to an unrecognized number not on the list. After a while they stopped that, they figured she was spending two days to track down $100 worth of LD calls, half of which no one would admit to. So they stopped doing it and decided it was not worth the trouble. Even reconciling each person's list wasn't worth the effort just to get a few bucks back from them.

I'm sure there are lots of companies that just pay the phone bill without auditing every entry on it. It isn't worth the effort and they have to trust their supplier not to cheat on them. That and checking any significant spike in usage is the point of diminishing returns.

andrew