Notice of legacy USDT support ending on Optimism

Last updated: 2026年10月26日

Kraken is ending support for legacy USDT on Optimism. USDT0 remains supported on Optimism.

Legacy USDT deposits will be disabled on November 9, 2026, and legacy USDT withdrawals will be disabled on December 7, 2026. Your USDT balance and your ability to trade USDT are not affected.

Key information

Legacy USDT deposits will be disabled on Optimism on November 9, 2026.
On November 9, USDT0 becomes the default option when you deposit USDT on Optimism.
Legacy USDT withdrawals will be disabled on Optimism on December 7, 2026.
USDT0 deposits and withdrawals are not affected.
There is no change to your USDT balance and no interruption to trading.

Legacy USDT sent to a Kraken deposit address on Optimism after November 9, 2026, will not be credited automatically. If this happens, contact Kraken Support.

Affected funding methods

Legacy USDT deposits and withdrawals on Optimism.

Legacy USDT contract: 0x94b008aa00579c1307b0ef2c499ad98a8ce58e58
USDT0 contract (not affected): 0x01bFF41798a0BcF287b996046Ca68b395DbC1071

Key dates

November 9, 2026: Legacy USDT deposits are disabled on Optimism. USDT0 becomes the default option for USDT deposits.
December 7, 2026: Legacy USDT withdrawals are disabled on Optimism.

What you need to do

If you use legacy USDT on Optimism, complete any deposits before November 9, 2026, and any withdrawals before December 7, 2026.

After these dates, use USDT0 on Optimism instead. If you don’t use legacy USDT, you don’t need to do anything.

Frequently asked questions

What is changing?

Kraken is ending support for legacy USDT deposits and withdrawals on Optimism.

Is USDT0 affected?

No. USDT0 remains supported on Optimism.

Will my USDT balance change?

No. Your USDT balance and your ability to trade USDT are not affected.

Can I still deposit legacy USDT after November 9?

No. Legacy USDT deposits are disabled on Optimism from November 9, 2026. Deposit USDT0 instead.

Can I still withdraw legacy USDT after November 9?

Yes, until December 7, 2026. After that date, legacy USDT withdrawals are no longer supported on Optimism.

How do I know if I’m using legacy USDT or USDT0?

Check the token contract address. Legacy USDT on Optimism uses 0x94b008aa00579c1307b0ef2c499ad98a8ce58e58. USDT0 on Optimism uses 0x01bFF41798a0BcF287b996046Ca68b395DbC1071.

What happens if I send legacy USDT after November 9?

Legacy USDT sent to a Kraken deposit address on Optimism after November 9, 2026, is not credited automatically. Please contact Kraken Support.

What should I do?

Complete any legacy USDT deposits before November 9 and any legacy USDT withdrawals before December 7. After that, use USDT0.