TRC-20 is the token standard on the Tron network and, in practice, the railway along which most casino USDT travels. When the cashier offers "USDT (TRC-20)", it means the stablecoin is sent via the Tron network rather than Ethereum.
Why casinos and players prefer it
Confirmation usually arrives within minutes and the network fee is small and independent of the amount — moving 20 or 2,000 USDT costs the same on the network. ERC-20 is the same USDT, but there the fee depends on network load and can eat a significant share of a small withdrawal. That is exactly why TRC-20 is the most common default for fast withdrawals; a comparison of network speeds and fees is on the payments page.
The one serious risk: the wrong network
An address looks different on every network, but the cashier does not check for you. If you send TRC-20 funds to an ERC-20 address or the other way round, the best case is a long exchange with support and a service fee, the worst is permanent loss. The rule is simple: the network has to match at both ends, and the first transfer to a new casino is always made with a small test amount.
What to check
- The withdrawal network. Some casinos accept a deposit on TRC-20 but offer withdrawal on a different network. - The minimum withdrawal and the casino's own service fee. Alongside the network fee there is often a second fee set by the casino. - How many confirmations the casino waits for before crediting — that number is in the cashier or the FAQ. - The memo/tag field. USDT on TRC-20 does not require one, but with some other coins a transfer sent without a memo goes missing on the recipient's side.
The network decides the fee and the speed; the casino decides how long the request waits before it even reaches the network.