Yellow Card

Used in many sports the yellow card it's most likely to indicate caution for bad behaviour. In football it is shown by the ref to indicate that a player has been cautioned. Then the ref records the players details in a small notebook. This action is most known as "booking."

Some reasons for booking are:

• Unsporting behaviour
• Dissent by word or action
• Persistently infringing the laws of the game
• Delaying the restart of play
• Failing to respect the required distance of a corner kick or free kick

In some tournaments, the accumulation of a certain number of yellow cards over several matches results in disqualification of the offending player for a certain number of subsequent matches, the exact number of cards and matches varying by jurisdiction.