Binance Coin (BNB) at a casino is usually a BEP-20 transfer. It is not the same as Bitcoin and not the same as a Binance account login.
Send BNB on the network the cashier names. The Binance exchange and the casino are separate companies. Withdrawing from Binance to the casino is an on-chain transfer you cannot cancel.
The casino pays BNB to an address you control. If that address is on the wrong chain, the payout does not arrive as spendable BNB.
A Binance username is not a deposit reference. Only the address and network from the casino cashier count.
- The method has to be visible in your own cashier before you send money.
- The name on the payment and the name on the casino account have to match.
- A bonus can exclude this method. The offer text in the account beats any headline.