USDT TRC20 and Coinbase: What to Check First
Before troubleshooting a stuck deposit, confirm that the specific Coinbase product you're using actually supports TRC20 USDT deposits at all — this has varied over time and by product.
Check supported networks in your account first
Coinbase's supported deposit networks for USDT differ between its consumer app and Coinbase Exchange/Advanced products, and have changed over time. Before sending, generate a deposit address inside your specific Coinbase account and confirm TRC20 is listed as an option — don't assume it is.
If you already sent funds and TRC20 wasn't actually supported
Sending TRC20 USDT to an address that wasn't actually set up to receive that network typically does not result in a successful deposit, even if the on-chain transaction itself shows as SUCCESS to that address string — the funds may not be recoverable through normal means without direct support intervention.
What to do
Contact Coinbase support directly with your transaction hash and ask specifically about TRC20 deposit recovery — don't assume the standard exchange-crediting-delay explanation applies here the way it does on exchanges with full TRC20 support.