shuffle asked for exchange screenshot but deposit came from private wallet.

Got an odd one. I usually deposit to casinos straight from my cold wallet, not an exchange. This time I did it the usual way, but now the casino is asking for a screenshot of the sending exchange account. Deposit definitely came from my personal wallet so I’m stuck on how to prove anything. Has anyone had to deal with this? It feels like overkill for a pretty small sum, but I know they’re cracking down more on KYC stuff. Would love to hear if anyone’s gotten past this without going in circles.