In contract bridge and particularly in duplicate bridge a convention card is a summary of the conventions and treatments that a particular pair is using. The Laws of Duplicate Bridge specify that "Each partnership has a duty to make available its partnership understandings to opponents before commencing play against them."
In games regulated by the American Contract Bridge League (ACBL), this is generally done using a form with a standard format. The ACBL General conditions of Contest specify that "Each member of a partnership must have a completely filled out convention card available for the opponents." Convention card formats may vary by jurisdiction. There are also various computer programs which a player may use to create and print a convention card.
- Kantar, Eddie (1999). Eddie Kantar Teaches Advanced Bridge Defense. Master Point Press. p. 130. ISBN 1894154037.
In tournament bridge, the opponents' convention cards are supposed to be marked telling you what their ranges are on the most common notrump sequences.
- "Laws of Duplicate Contract Bridge" (PDF). ACBL. 2008. Law 40 A 1 (b). Retrieved 7 October 2013.
- "ACBL Genereal Conditions of Contest for All Events" (PDF). ACBL. 1 January 2013. p. 5. Retrieved 7 October 2013.