Behind "How to pay with usdt?" sits one idea: the coin is the same, the road it takes is not. USDT TRC20 is the version of USDT issued as a TRC20 token on the TRON blockchain, and it is one of the most common ways to send USDT because fees there are usually low. The same coin also exists as BEP20 on BNB Smart Chain and as ERC20 on Ethereum. Each version has its own fees and rules, and a balance on one network never moves to another on its own.
What is the TRON TRC20 network? TRON is a blockchain with its own coin, TRX, and TRC20 is the token standard under which other coins, USDT included, are issued on it. TRX and TRC20 are different things: one is the native coin, the other is a format. TRON counts fees in resources called energy and bandwidth. An account uses the resources it holds or has been delegated, and when they run short the network burns TRX to cover the gap, so one transfer can cost different amounts from one account to the next. TRON addresses usually start with the letter T.
What is the BEP20 network? Strictly, BEP20 is a token standard on BNB Smart Chain rather than a network of its own, though wallets and cashiers list it as one. USDT BEP20 is the version of USDT issued under that standard, and its fees are paid in BNB, the native coin of the chain, usually at low cost. Addresses on BNB Smart Chain start with 0x exactly as Ethereum addresses do, and one address can exist on both chains. The look of an address therefore never shows which network a payment will travel on.
Answers in brief
Why check deposit and withdrawal pages separately?
Some platforms accept a network for deposits but not for withdrawals, or the other way round, so each page lists its own networks.
Why can one address work on two chains?
Ethereum and compatible chains share the same address format, so one 0x address can exist on both while the balances on each stay separate.
How are fees paid on the TRON network?
In energy and bandwidth, from resources the account holds or has been delegated; when those run short, the network burns TRX to cover the difference.
What pays the fees for USDT BEP20?
BNB, the native coin of the chain, so a wallet sending BEP20 tokens needs a little BNB.
How can a wallet be checked for TRC20 support?
Its network list for sending and receiving should name TRC20 or TRON explicitly; supporting USDT alone says nothing about the network.
What does a TRON address look like?
A TRON address usually starts with the capital letter T, unlike the 0x addresses of Ethereum and compatible chains.