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Not penalized — For trivial offences.
Repeated cases or refusal to follow requests may lead to obstruction penalty at the referee’s discretion.

Point penalty — For minor offences or particular cases.
The points are removed from the offending player's overall score. They are not added to the opponents' scores. It doesn't change the table's score.
(1 overall score point is equivalent to 1000 points at the table.)

E.g. if a player ends the first session with a table score of 40,000 points and is the best ranked at the table, his session score will be 25.
Since it's the first session, his overall score will also be 25 for now.
He will starts the second with a table score of 30,000 points (new session) and an overall score of 25.
If he's calling with a dead hand, he gets a 20 points penalty to his overall score. After the penalty he will still have a table score of 30,000 points, but an overall score of only 5.

Dead hand — When the offending player's hand can not continue normally.
The offending player cans no longer chii, pon, kan, riichi nor win during this hand. This includes the interdiction to declare a concealed kantsu. The hand is noten.

Chonbo — When other players' hand can not continue normally.
20 points penalty and the hand is re-dealt. The points penalty are handled as described in the points penalty section.
Riichi bets are returned to the players who declared riichi. No continuance counter is placed, and the dealer does not rotate. There is no "mangan payment".
• If a chonbo occurs simultaneously with a win, the hand is not re-dealt: the offending player gets a 20 points penalty, the winning hand is scored, and the seat rotation is resolved normally.
• If a chonbo occurs simultaneously with an exhaustive draw, there is no noten payment and no continuance counters are added.

Disqualification — When the tournament cannot continue normally.
The offending player is not allowed to play anymore for the whole tournament.
He will not be listed in the ranking.
Relevant organizations, like the national federation he depends on, will be informed.

Empty call and changing a call:
A player making a call, including riichi and concealed kantsu declarations, but being unable to perform the claimed action will be penalised for "empty call".
Calls can not be changed. If the player is unable to perform the first call, he will be penalised for "empty call".

• Empty call for a shuntsu, kōtsu or kantsu:	Dead hand
• Empty concealed kantsu declaration:	Dead hand
• Empty riichi declaration:	Dead hand
• Empty call for a win:	Chonbo (even if the offending player has not shown his hand)

Calling with a dead hand (including concealed kantsu and riichi declaration):

• If the hand was not formally declared to be dead:	Not penalized, the call is voided.
• If the hand was formally declared to be dead:	20 points penalty, the game continues.

Wrong word:
The valid terms for calling are: "chii", "pon", "kan".
The valid terms for declaring riichi are: "riichi", "reach".
The valid terms for winning on a claimed tile are: "ron".
The valid terms for winning on a self-drawn tile are: "tsumo".

• Using alternative terms like "chow", "pung", "kong" or "mahjong":	One (1) point penalty.
• Using an incorrect term (e.g. saying "ron" instead of "tsumo"):	One (1) point penalty.

Wrong tile count:
• Not taking a claimed tile before the next two players have made a discard: Dead hand
• Having too many or too few tiles: Dead hand

Wrongly revealing tiles:

	1 to 5 tiles	6 tiles or more
From the live wall	Not penalized	Chonbo
From the dead wall	Dead Hand	Chonbo
From the player's own hand	Not penalized	Chonbo
From another player's hand	Dead Hand	Chonbo

If six tiles or more are revealed due to no mistake on a player’s part, the hand is re-dealt without any point penalty.
Wrongly revealed tiles are placed back where they came from.
The penalty for wrongly revealing tiles does not apply while building the walls, before the dice are thrown to break the wall.

Picking a tile from the wrong part of the wall:

• From the live wall:	Not penalized
• From the dead wall:	Dead hand

If the mistake is realized or pointed out before the discard, the mistake should be corrected.

Wrong riichi declaration:

• Not placing the 1000 points riichi bet	Not penalized, the mistake should be corrected.
• Not saying "riichi" or "reach"	Dead hand, the riichi declaration is voided.
• Not rotating the first discard	Dead hand, the riichi declaration is voided.
• Declaring riichi on an open hand	Dead hand, the riichi declaration is voided.
• Declaring riichi on a noten hand (noten riichi)	Chonbo. *
• Invalid concealed kantsu after having declared riichi	Chonbo.

In case the first tile is claimed by another player, forgetting to rotate the next discard is not penalized. The mistake must be corrected. If the tile to rotate is unknown, the earliest discarded tile among the supposed ones is chosen regarding furiten.
When a riichi declaration is voided, the player takes back his riichi bet and will not get a noten riichi penalty.

Cases of noten riichi and invalid kantsu are only determined in case the player wins or there is an exhaustive draw.

* The noten riichi penalty does not apply if the player's hand is noten solely due to a dead hand penalty occurring after the riichi declaration. The player still pays for being noten.

Passing information:
Penalty at the referee discretion. Minor cases would not be penalized.
It is permissible to correct a player who is about to commit a minor irregularity or etiquette error.
It is permissible to make it clear if a player has a dead hand.

Cheating:
A player caught cheating will be immediately disqualified.

Obstruction:
Penalty at the referee discretion.
Repeated obstructive behaviour can result in disqualification.

Being late for a session:

• Being late by one to ten minutes:	One (1) point penalty per minute.
• Being late by more than ten minutes:	Replacement by a substitute player for the session.

Missing a session and substitute players:
Substitute players are scored normally and then not included in the ranking.

The player missing the session doesn't get any point and will have a 30 points penalty.
This penalty is not cumulative with the 10 points penalty for being late 10 minutes. A player who is late by ten minutes and is substituted will only have a 30 points penalty for missing the session.

At the head referee discretion, a player intentionally missing a session without good reason can be disqualified for obstruction; especially if he leaves the table when his score is below the penalty or if the penalty doesn't make a real difference regarding his current overall score.

To ease tournaments schedules, a time limit can be applied to each session. The recommended time limit is 90 minutes.
When the time ends, players must finish the current hand. If the walls are not set up or the dice not thrown when the time ends, the session ends immediately.
In case of chonbo during the last hand, the hand is not re-dealt.

At the beginning of sessions, waiting for the signal to begin, players are allowed to build the walls, but the dice cannot be thrown and the deal cannot begin before the signal.

Championship organizers are free to use any convenient way they like to keep the scores during sessions.
When using scoring sticks, organizers must prepare a way to handle scores below zero and inform the players about it. For example, by having referees distributing extra scoring sticks when necessary and/or recording "debts" on a sheet. The game continues anyway.

When paying with scoring sticks, players should put the sticks on the table for anyone to see them.