Edge sorting is a form of cheating where a player might notice small imperfections on the back of a particular card. Whether it’s a minute scratch, a folded corner, a frayed edge, or something else that distinguishes a particular card from the others.
Casinos consider edge sorting to be cheating, and if you are caught edge sorting you may be removed from the venue. In some cases, depending on the country you are in, you may also be denied from receiving your winnings for games that were won using edge sorting. Please do not try it.