To exchange ERC20 USDT for BTC, you need to follow a few steps:
Submit an application, indicating the amount of Tether ERC20 USDT for the exchange, BTC wallet and e-mail.
Read the terms of the agreement for the provision of exchange services, if you accept them, check the appropriate box. And create an application.
After sending Tether ERC20 USDT, wait for network confirmation 10.