I’m not aware of any large US airline that routinely provides fuel slips to crews. The last time I got one was last year, and it was more of a curiosity than anything else. At cruise, we fished it out of the trash and tried to figure how much we’d have to pay to put that much fuel into our personal cars.
At my company, there’s no (convenient) way to check how much fuel it arrived with. That number isn’t much use anyway. How long was the APU running?
Good point about the fuel quantity indicators though. I assume this is a maintenance function? For those who do the check to verify the FQIS is reading properly, how often do you find it’s out of tolerance?