According to a new court filing, more than 300 Roblox users are purportedly laundering money by using in-game currency to purchase fake in-game goods, according to a proposed settlement filed in San Francisco federal court Tuesday.

“They appear to be using the Roblox platform to send money to one another by purchasing fake items, a highly inefficient and costly means of transferring money which suggests they may be engaged in money laundering or other improper behavior,” the filing states.

The case alleges that Roblox arbitrarily removed some in-game items from players after they’d been sold, depriving that player of both the item, and the money they had already paid for it.