* Chip matching
At the suggestion of a poster in the thread below, I'm adding this method. (Can't think of a more creative name.)
https://www.pokerchipforum.com/threads/tournament-ends-up-with-more-chips-cheating.125109/
This involves introducing chips which match those used by the host, whether a home, private or casino game.
For example, if a home game uses commercially-available chips such as Milanos or Majestics, a player could readily obtain some of the same denoms and slip them into his stack. Presumably they would want to use higher denoms, but people are weird / irrational so it could even be lower values.
In the thread linked above, a casino found that its tournament wound up with far more chips than had been issued to players, but all the chips were authentic... One theory is that the casino had used the same chips for some prior lower-buyin tourneys as for its higher-buyin event. So cheats bought entries to the cheaper events, pocketed the high-denoms, then added them to their stacks in the pricier game.
Casinos and most higher stakes private games seek to have unique chips, presenting a different challenge to the cheater. There have been reported instances at casinos where someone has introduced chips which resemble the house chips but do not actually match, relying on the inattention of dealers and other players to launder the fakes.
https://www.njoag.gov/man-sentenced...shing-2-7-million-in-phony-chips-down-toilet/