In trick-taking card games, a revoke (sometimes renege, /rɪˈneɪɡ/ or /rɪˈniːɡ/) is a violation of the rules regarding the play of tricks that is sufficient to render the round invalid.
A revoke is usually a violation of one or more honor rules, and often comes to light after its commission, as trick-taking games play with hands concealed.
Trick-taking games normally have several rules regarding which cards may and may not be played to a trick.
However, attentive players will soon notice the violation when a spade is played to a subsequent trick.
Some honor rules in different trick-taking games include the following: A common penalty for a revoke is to give the player a penalty equal to the most severely negative outcome of the round possible.