Container keys bought in-game in Counter-Strike: Global Offensive are now officially restricted to the account that purchased them after it turns out that people were using them for fraud.

In a post on the official CS:GO website, it was explained that key trades had changed from being legitimate transactions to being used by worldwide fraud networks in order to liquidate their assets. The blog post states that “nearly all key purchases that end up being traded or sold on the marketplace are believed to be fraud-sourced.”

Money laundering is the illegal process of concealing the origins of money obtained illegally by repeatedly passing it through various transactions. Using multiple transactions obscures the origins of the money, meaning it can be returned to the original launderer without suspicion.

Container keys themselves will not change in any way and can still be bought to open containers. The change will also not affect any pre-existing container keys purchased before the 28th of October, which can still be sold on the Steam Community Market and traded.

The CS:GO team apologise for any inconvenience caused to legitimate users, but say that “combating fraud is something [they] continue to prioritise across Steam and our products.”

For more information, including who to contact if you have feedback or concerns about this, you can check out the official blog post here.