Looks like the head of the guild has some integrity. Still, I'd have expected the scammer to have handled many contracts so the ones scammed have apparently not been very outspoken and never made more than one contract (since with contracts from another employee, they might have noticed the difference.) They also don't have an auditing system.
It's also amazing this guy wanted to destroy the evidence of this contract, but has tons of scam contracts apparently directly linked to him that are filed. It seems pretty insane to want to cheat the system under these conditions where it's very easy to gather evidence against him. Also, was he showing off his wealth through his clothes? That's a bit of a giveaway that he's living beyond his means.
I also tend to be quick with death sentences, but in this case: No, they really don't. The scamming employee and the guard who overreacted and beat Millie's father down deserve to be brought to justice, but that's it.
Well, the guards were just doing their job; he didn't call specific guards after all. The violence they exhibited might be an accepted response in this story's setting. Unless they did their job incorrectly, there's little reason to punish them.
Vietnam has recently convicted someone doing financial fraud to the death penalty, but that's pretty rare for that type of crime. No clue how the scamming employee will be punished in this setting; prisons? Slavery? Death penalty? They'll have to find some way of paying back the damages and they likely won't be able to do this type of job. I doubt we'll learn what happens to this guy though.