title: How can I know which user made which USDT transaction?
body: <p>I am making an app, and I want my users to deposit USDT coin to my address which is an exchange address (I don't have the private keys).</p>
  
  <p>How can I know which user made which transaction?</p>
  
  <p>I have a way, which is to add the numeric user ID to the amount , for example if an user wants to deposit 100.00 USDT coin , and the ID is 158769, I can add the ID in the amount like this: 100.0000158769 and make it as a QR-code so the user should deposit the exact amount so I can know that he made this transaction, but is there any other way to do it , any idea?</p>
  
  <p>Thanks in advance</p>