Putting Things in Order

How many times have you tried to play cards with your friends but did not have a new deck of cards available, so you had to be content with recovering a used one from a drawer? Unless you have been involved in gambling, where the perfect state of the cards is a necessary condition to ensure the absence of special marks that could easily identify some of them, any deck of cards in good condition is okay in all games for leisure, provided that it is complete. But how can we establish that it is? Or, better, considering the subject of this text, how can we establish this condition as quickly as possible?