Check the address whitelist before a Mantle bridge transfer

A Mantle bridge transfer may be blocked by an address whitelist on your wallet or exchange. The key check is one destination address: confirm it is approved wherever you are sending from.

A whitelist is a list of addresses a service permits you to use. It can help prevent a transfer to an address you did not intend, but it does not move funds or confirm that a bridge transaction has completed. For a fuller explanation of the transfer steps, see this mantle bridge guide.

Where does an address whitelist apply?

A whitelist applies at the service that enforces it, such as an exchange account or a wallet with an address-book restriction. It is not automatically a setting shared by every bridge, wallet and exchange you use.

If you withdraw from an exchange to start a transfer, the exchange may require you to add the receiving address first. A self-custody wallet may instead let you sign the bridge transaction directly, unless that wallet has its own address rules. Check the service’s settings before you send.

Which address should you approve?

Approve the address that will receive the assets on the destination network. A bridge interface may prefill it with the connected wallet address, but check the destination field before confirming. If you are sending to a different wallet, use that wallet’s address.

Addresses on Ethereum and Mantle can look alike, but balances and token contracts are specific to each network. A matching address format does not prove that you selected the right destination or asset. Check these details before signing:

• The source and destination networks.
• The receiving address, including every character.
• The token and amount shown for the transfer.
• Whether the service requires the address to be approved first.

If you copy an address into a whitelist, verify it against the destination wallet itself. A mistaken or outdated entry can make the transfer fail or send funds somewhere you cannot access. Some services also impose a waiting period after adding an address; check the service’s own rules rather than assuming approval is immediate.

What happens if the address is not whitelisted?

The service enforcing the list may reject or pause the action until you approve the address. That does not mean the bridge has received your funds. If you have already signed a transaction, check its status on the source network before trying again.

Do not approve a second transfer just because the destination balance has not updated yet. Bridge transfers involve transactions on different networks, and the receiving side may take time to reflect the result. Use the transaction status and destination network to check progress.

For most readers, the safest habit is to approve the exact destination first, then review the network, token and amount again before signing. After you send, watch for source-network confirmation and the destination balance; if an exchange applies an address hold, watch for that service’s approval period to end.