A player goes out when they discard or meld the last card in their hand. This isn't as simple as it sounds though. A player is not allowed to go out unless they have completed 2 black or dirty canastas and 1 red or clean canasta. Although not required, it is usually a good idea for a player to ask their partner before they go out in case the partner has a lot of high point value cards in their hand that will count against that partnerships score. However, the partner's response can only be a yes, no or I wouldn't advise it.