USDT vs USDT0: differences and what to check before a transfer

If you hold USDT on Arbitrum or Polygon, your block explorer and some wallets may already display it as USD₮0 (USDT0). On Optimism, several exchanges and swap services switched to a new contract in September–October 2026, changing how they accept deposits of the old token.

USDT0 is backed by USDT at a 1:1 ratio and retains the same dollar peg, although its market price can deviate from $1. Before sending funds, check the network, token contract and deposit requirements. When using decentralized finance (DeFi) services, you also need to review the permissions you grant by signing messages.

What is USDT0, and who issues it?

USDT0 is a version of USDT for networks where Tether does not issue the token directly. The project launched on January 16, 2025, on Ink, an Ethereum layer 2 (L2) network created by the Kraken exchange. USDT0 uses LayerZero’s OFT (Omnichain Fungible Token) standard, which allows tokens to move between blockchains without changing their total supply. Everdawn Labs developed the contracts, and the project is run by the USDT0 consortium in partnership with Tether and LayerZero.

USDT0’s backing is held on Ethereum. When a user transfers USDT from Ethereum to a USDT0 network, the OFT Adapter contract, also known as a lockbox, locks the deposited USDT, and the corresponding amount of USDT0 is minted on the destination network. Subsequent transfers between connected networks use a burn-and-mint mechanism: tokens are burned on the source network, and the same amount is minted on the destination network once the LayerZero message has been verified. Each USDT0 in this system is backed by one locked USDT.

As of October 20, 2026, the official list of USDT0 networks and contracts covers 24 networks, including Arbitrum, Optimism, Polygon, Berachain, Ink, HyperEVM, Plasma, Mantle, Monad, Unichain, Sei, Stellar and Hedera. Ethereum is also listed, but there is no separate USDT0 token on Ethereum: adapter contracts lock and unlock regular USDT. According to the project’s June 25, 2026 announcement, cumulative cross-chain transfer volume exceeded $100 billion in 525 days of operation.

USDT vs USDT0: what is the difference?

Native USDT and USDT0 differ in how they are issued, how they move between networks and which permissions can be granted through a signed message.

Issuer and trust model

Native USDT is the token Tether issues directly on a particular network, such as Ethereum, Tron, Solana, TON or another supported blockchain. Because USDT0 is backed by USDT locked on Ethereum, holding it exposes you to both Tether’s risks and those of the USDT0 contracts and LayerZero infrastructure.

How tokens move between networks

A regular transfer can only send USDT within the same blockchain. Moving funds from Tron to Arbitrum, for example, requires a separate route: an exchange that allows withdrawal on another network, a supported bridge or Legacy Mesh. When choosing a third-party bridge, check exactly which asset you will receive. Some bridges issue their own wrapped token with a different contract and additional risks.

The official USDT0 Transfer service supports transfers between connected USDT0 networks. A standard OFT route has no separate fee in USDT, but you pay gas and the LayerZero messaging fee in the source network’s native coin, such as ETH on Arbitrum or POL on Polygon. The interface may also offer a faster route for an additional fee. Before confirming, check the selected route and the amount you will receive; after sending, track the transfer status against the service’s estimated completion time.

Legacy Mesh: connecting Tron, TON and Solana to USDT0

Legacy Mesh connects networks with native USDT—Ethereum, Tron, TON, Solana and Celo—to USDT0 networks through a central hub on Arbitrum. A transfer from Tron to Plasma, for example, uses liquidity pools: USDT is locked in the Tron pool, and once the message is verified, the Arbitrum pool releases the corresponding amount of USDT0. From there, USDT0 moves to Plasma through burn-and-mint. You can complete the transfer through a single service, although a token spending approval may require a separate confirmation.

Legacy Mesh charges 0.03% in USDT, or 3 USDT on a 10,000 USDT transfer, in addition to network costs. If you received TRC-20 USDT on Tron, this route lets you move it to a supported USDT0 network without going through an exchange or receiving a third-party wrapped token.

Additional risks

USDT0’s verification system requires confirmation from all three Decentralized Verifier Networks (DVNs): LayerZero, USDT0 and Canary. Compromising one of them is not enough to validate a forged message. Guardian, ChainSecurity and Paladin have audited the contracts, and the project runs a bug bounty program on Immunefi. The maximum reward for a critical vulnerability is $6 million for Ethereum Virtual Machine (EVM)-compatible networks and $1 million for non-EVM networks.

On most EVM networks, USDT0 contracts use an upgradeable proxy, allowing their logic to be updated without changing the contract address. Administrative operations are controlled by a multisig wallet, which requires signatures from multiple key holders to authorize an operation. The contract owner also manages an address blocklist that can restrict token operations.

When deciding how much to hold in USDT0, account for the risks of its contracts and cross-chain transfer system. Switching to native USDT removes your reliance on those contracts and that transfer system, while issuer and freezing risks remain. We explain how freezing works in our guide, Can USDT be frozen on a hardware wallet?

Which networks have migrated from USDT to USDT0?

The migration to USDT0 worked differently across networks: Arbitrum and Polygon kept their existing contract addresses, while USDT0 on Optimism has a separate address. On Optimism, you therefore need to distinguish the old USDT from the new USDT0 by contract, even if your wallet displays the same name for both.

USDT holders on Arbitrum and Polygon did not need to move their tokens manually: their balances were preserved when the existing contracts were upgraded. Depending on its data source, a wallet or block explorer may display the token as USDT, USD₮0 or USDT0. Some exchanges, including OKX, also list USDT0 as regular USDT.

The old Optimism contract still exists, and holders or DeFi protocols may still have balances in that token. Some exchanges stopped crediting deposits of the old token after migrating to USDT0, but there is no single rule across all platforms. Binance, for example, labels the old token OPUSDTE and explains in its migration completion announcement that users can deposit it and then convert it to the new token at a 1:1 ratio. Before sending, check your exchange’s current instructions, including the deposit address for the asset you want to transfer.

On IOTA, USDT0 has a dedicated route paired only with Ethereum. Its USDT backing is locked in a separate lockbox, and there is no direct transfer from IOTA to Arbitrum, Plasma or other USDT0 networks.

Mistakes that can put your USDT0 at risk

A token missing from your wallet interface, an uncredited deposit and a counterfeit token each require a different response. Before repeating a transfer or looking for a recovery method, establish what happened.

• The token does not appear in your wallet. If you have not added the network or USDT0 to the app, the funds you received may only be visible under your address in a block explorer. Verify the transaction and contract, then add the correct token. Never share your seed phrase with anyone offering to “synchronize your wallet” or help display your balance.
• A counterfeit token is named USDT0 or USD₮0. Names and icons can be copied, so verify a token by its contract on the specific network. Scammers may send fake assets to lure wallet holders to phishing sites. Another tactic is address poisoning: transactions involving addresses that resemble your recipients’ addresses appear in your history, in the hope that you will copy one by mistake.
• A service uses different deposit addresses for different assets. Even on the same network, an address for one token may not accept another. For example, Hyperliquid’s instructions state that its Plasma deposit address accepts only XPL. USDT0 sent there is not credited; the documentation points to Unit’s revert function as a way to attempt recovery.
• The exchange does not support the selected network. Arbitrum, Plasma, Ink, HyperEVM and other EVM networks use the same address format. Your wallet may therefore let you send USDT0 even though the exchange accepts deposits to that address only on another network. Recovery then depends on the exchange’s technical capabilities and policies: some platforms process these requests manually for a fee, while others do not return unsupported deposits.
• Old USDT is sent to a USDT0 deposit on Optimism. The token name in your wallet and the network may match the exchange’s deposit details even though the contract is different. If the exchange no longer accepts the old token and offers no conversion or recovery procedure, the funds may remain uncredited or be lost.

What to check before transferring USDT0

Start with the recipient’s instructions or deposit form to find out which network and token version they accept. Then compare those details with the token in your wallet.

1. Open the deposit form. Find the available USDT networks and any notes about the token contract. A platform may accept USDT0 under the name USDT, so the name alone is not enough. Supported networks and deposit availability can change; check them before using an unfamiliar transfer route.
2. Verify the token contract in your wallet. Open your address in the relevant network’s block explorer—Arbiscan, Optimistic Etherscan, Polygonscan or another explorer—and find the token. Compare its contract address with the Token address listed for that network in the Deployments section of the USDT0 documentation. The OFT and OFT Adapter addresses in the same section belong to other system components and are not substitutes for the token address.
3. Distinguish between the two versions of USDT on Optimism. If you see two tokens named USDT, check each contract. To deposit USDT0, make sure you are sending the token from the new contract listed in the table above. Copy the recipient address from the exchange’s deposit form. Only send old USDT if the platform explicitly explains how it accepts that token and provides the address to use.
4. Have the native coin ready to pay fees. You will need ETH on Arbitrum or Optimism, POL on Polygon, or the appropriate native coin on another network. On a standard USDT0 Transfer route, you also use that coin to pay the LayerZero messaging fee. If you have no native coin on the destination network for subsequent transactions, the interface may offer to include a small amount with your transfer.
5. Confirm that a test transfer is credited. Before moving a large amount, send a small amount, such as 10–20 USDT, provided the amount received after fees meets the service’s minimum deposit. Wait until the funds appear in the recipient’s balance: a confirmed transaction in a block explorer does not necessarily mean the exchange has credited the deposit.
6. Check the cross-chain route. Bookmark the verified address of USDT0 Transfer or your chosen aggregator and open the service from that bookmark. Before connecting your wallet, make sure the domain matches the official website. Before signing, check the destination network, recipient address and amount to be received. You can track the message status on LayerZero Scan using the transaction hash.

Using USDT0 with a hardware wallet

On most EVM networks, USDT0 is an ERC-20 token you can manage with the same hardware wallet account you use for Ethereum. The same EVM account will usually have the same address on Arbitrum, Optimism and Polygon. USDT0 works differently on Stellar, Hedera, HyperCore and IOTA, so check network and token support separately. For help choosing a network and storage method, see our guide Where to store USDT: which network and wallet to choose.

If the manufacturer’s app does not display USDT0 on the EVM network you need, open a compatible app such as MetaMask or Rabby, select its option to add a hardware wallet and connect your device. Your private key stays on the device, and you do not need to enter your seed phrase to connect it.

On most networks, USDT0 supports EIP-2612 (permit), which lets you grant a token spending allowance by signing a message, and EIP-3009 (transferWithAuthorization), which lets you sign an authorization for a specific transfer. Creating either signature does not send a transaction or cost gas, but another party can submit it to the contract and carry out the authorized action. The deadline field in permit limits when the signature can be submitted, while an allowance already set on-chain may remain valid after that date. Available features vary by network: Polygon PoS, for example, supports permit but not EIP-3009. The differences are listed in the USDT0 feature support table.

USDT on Ethereum has no built-in support for these two standards, but that does not make every signature involving it safe: approvals can also work through other contracts, including Permit2. If a token supports permit or transferWithAuthorization, a scammer can disguise a spending approval or transfer authorization as a login confirmation and trick you into signing it. Even a signature that costs no gas can grant access to your tokens.

Before confirming, check the message type, network, token contract, the address you are authorizing or sending funds to, the amount and the expiration time. Review the details on your hardware wallet’s screen if the device can display them for that request. If it only shows a hash instead of readable fields, you are being asked to blind sign, without seeing the decoded contents. Reject the request if you cannot verify what you are authorizing. When using DeFi, check how your model and current firmware display the service’s specific request: the EIP-712 structured data fields you are signing should be readable. A device may support EIP-712 yet still fail to display some requests in full. For more on reviewing operations on the device’s screen, see our guide to Clear Signing and Blind Signing.

What to do if a transfer goes wrong

1. Stop sending funds to the same address. Another test transfer will not fix the mistake and will only increase the amount you need to recover.
2. Save the transaction details. Find it in the source network’s block explorer and copy the transaction hash, network name, recipient address, token contract and amount. You will need these details to investigate and contact support.
3. Check the cross-chain transfer status. Find the transaction on LayerZero Scan and check the message status. If it is still within the estimated processing time and no error is shown, wait for completion. Once the message is delivered, check the transaction outcome and balance on the destination network, adding the correct token to your wallet if necessary. If the transfer does not complete or the service shows an error, use the official USDT0 Contact page to get help and include the transaction hash.
4. Contact the exchange’s support team if you sent funds to its address. Open a ticket with the transaction details and explain which token you sent and on which network. The platform’s policies determine whether it can credit the deposit manually or return the funds, how long that may take and what fee it will charge.
5. Check Unit’s recovery procedure for a mistaken USDT0 deposit via Plasma. If you sent USDT0 to a Hyperliquid address intended for XPL, open the revert link in the official Hyperliquid instructions and work through the Unit recovery instructions. This procedure applies to specific types of mistaken deposits supported by the service; it is not a universal token recovery method.
6. Verify who you are talking to. After you post a public question on Telegram or X, scammers may contact you pretending to be support. Open support requests through the official website, and never share your seed phrase or private keys: neither is needed to locate a transaction.

If nobody has the private key for the recipient address, or the tokens were sent to a contract with no way to withdraw them, recovery may be technically impossible.

Conclusion

USDT0 retains USDT’s dollar peg and makes transfers between connected networks easier, but its reliability also depends on USDT0 contracts and LayerZero’s messaging system. Arbitrum and Polygon migrated without changing token contract addresses, while old USDT and new USDT0 coexist on Optimism. Before sending funds, check the network supported by the recipient, token contract and deposit requirements. When using a hardware wallet, review every signing request, including those that cost no gas.