jasper
Rotten DM
I have asked too. The player shut me down with his honesty. He found a friendly AL dm. Just before Season 8 started he and a group of his friends went farming various modules and adventures. All his fighters have +1 flame tongues.As a DM, I have absolutely asked to see paperwork from players when there was something that didn’t seem right to me. As a player, I've had to show certs to people to show that my character was kosher (to be fair, an undead barbarian isn't a common thing in AL play).
The honor system works pretty well, but if there’s ever a question, having that paperwork can absolutely help you out. The reward for honesty is being trusted at a table and actually getting to play your character. I for one wouldn't want to risk being banned from an event for cheating.
I have certs for pistols, and goblin breaking the Volo rule.