Notice of legacy USDT support ending on Optimism

• 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 deposits and withdrawals on Optimism.

• Legacy USDT contract: 0x94b008aa00579c1307b0ef2c499ad98a8ce58e58

• USDT0 contract (not affected): 0x01bFF41798a0BcF287b996046Ca68b395DbC1071

• 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.

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.

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

No. USDT0 remains supported on Optimism.

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

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

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

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

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

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