Cheating

Cheating is a case where contestants attempt to rig the game for them to win in one way or another.

Sockpuppetry
Sockpuppetry occurs when a contestant (known as the sockpuppeteer) attempts to further their own game by entering a second account (known as a sockpuppet) into the game.

Another form of sockpuppetry occurs when a former contestant tries to enter a different account into another season, with the hopes of being able to play again, unbeknownst to everyone else.
 * Since most ORGs are moving to Discord. Each new player account will be looked at so that way production doesn't accidentally add them to more seasons that they shouldn't be in. This has now started after Survivor: Seychelles.

Password Stealing
Password stealing is when one contestant obtains another contestant's password and play as them. This is considered cheating as another tribe mate is doing the work for a different tribe mate, which can unfairly help them win.

Trivia

 * KC, DT, Matt, and Constance are the only players so far to be banned from playing before entering another season.
 * ItsAjNeale, StackyBro, Drawnevaeh, and Charlie.W1993 are the only players that have never really cheated, but played as different username in other ORG's. This let to their usernames they DON'T use to not play again. While their regular usernames are still eligible to play and return to future seasons.