I have been a party to a re-rating.
They had started a tournament here and were guaranteeing $5000 first place for the team event. My little weenie scratch team bowled in it and shot huge for us around 3450 scratch and about 3500 handicap. We beat all the other teams entered by over a hundred pins except for one team that ended up beating us by close to 200 sticks with 300 pins handicap.
We didn’t think anything about it but after the tournament the tournament director re-rated the other team. Seems they leaved in a town near the border with another state. Their averages in Kansas were used but their other state averages were about 20 pins a man higher.
After the re-rating we ended up winning and they were second.
Sad ending though, the tournament died after about 3 years. But at least they tried to run a clean tournament.