A small test must still clear the minimum
A first transfer should be small enough that an error will not consume your whole budget, but large enough to meet the receiver's net deposit minimum. Sending a token amount below that threshold can produce a successful blockchain transaction with no usable casino credit. Account for a second transfer fee if you intend to send more after the test.
For an illustrative USDT route with a 10 USDT minimum and a 1 USDT fee deducted from the amount, entering 10 USDT sends only 9 USDT. Entering 11 USDT would leave 10 USDT for the recipient. These numbers explain the arithmetic; they are not a tariff or minimum for a particular casino.
Wait until the test reaches the casino balance. Then check the destination again before sending a larger amount. A previous successful transfer does not make an old address, a changed network or a new account instruction safe to ignore.
A wallet balance can still need a fee balance
With an exchange withdrawal, the preview usually quotes the fee and what the recipient will receive. In a self-custody wallet, the chain's fee is a separate requirement. Ethereum transactions pay gas in ETH. A normal USDT transfer on TRON uses bandwidth and energy; insufficient resources can lead to a TRX charge.
Do not buy an extra token because someone in a private message says another payment will release your deposit. Use the fee shown by your wallet's genuine send screen. Network and transfer fees explains how to distinguish the network cost from an exchange's withdrawal charge.
A service called a wallet may have a very different payment contract. Altyn's crypto transfers are restricted to and from wallets belonging to the user; a casino's deposit address does not meet that description merely because it appears in your account. Antarctic Wallet prohibits gambling activities. Neither is a shortcut around a sender's payment restrictions. Wallet choices for Russia explains custody and transfer features.