Valve does not allow the resale of new keys for cases Counter-Strike: Global Offensive, which are purchased with real money and are used to unlock boxes with different cosmetics. In other words, keys will not be able to leave the account that purchased them, making it impossible to sell them on the Steam community market.

what is the reason? Valve has learned that they are being used for money laundering.

In the past most of the key transactions that we observed was between the legitimate clients. However, the world fraudulent network recently switched to using keys CS: GO for the cash. At the moment, almost all sales are considered fraudulent. We decided that the newly purchased keys will not be sold.

the Fight against fraud is something we continue to give priority to Steam.

pre-existing keys CS:GO will not be resolved — these keys still can be resold. Probably the scammers will go to to cash using other products on Steam.