Deck Checks

Tournament Rules section 411 — 5 rules. From Riot's Tournament Rules for sanctioned events, last updated October 9, 2026.

411.1.: At high OPL, judges should perform deck checks during the course of the competition.
411.2.: When deck checks are performed, at least 10% of all decks, chosen at random, should be checked during the course of the competition.
411.3.: Random deck checks should occur at the start of a round, after players have randomized and presented their decks, but before opening hands are drawn and should verify all elements of the registered decks.
411.3.a.: A deck check can be performed after the mulligan procedure is complete as long as play has not begun and each player’s hand is preserved.
411.3.b.: If a deck check is performed within a match, judges should grant a time extension to that match sufficient to cover the logistical time needed to perform the check.