Basic information:

• Pegged currency: US dollar
• Issue date: 2014
• Company: Tether Limited
• Market value: about $2.2 billion (as of 2019.3)

There are many types of USDT released by Tether, two common ones:

Bitcoin-based USDT

This type of USDT token is based on the Bitcoin network's Omni protocol. The receiving address is the same as the Bitcoin main address. The transfer transaction requires Bitcoin to be used as miner's fee.

More about Omni protocol

Note: Do not use Bitcoin child address for USDT receipts.

Ethereum-based USDT

This type of USDT token is based on the Ethereum ERC-20 standard. The receiving address is the same as the Ethereum address. The transfer transaction requires Ethereum to be used as miner's fee.