Do I need to revoke the same token approval on every chain?

If you granted relevant approvals on several chains, review them on each chain. A revocation on one network changes that network’s token state, not every other deployment that uses the same account or token name.

Use a complete permission record

Record network, owner address, token contract and spender. The ERC-20 allowance model lives in a particular token contract. Identical-looking addresses or ticker labels do not merge the state of separate chains.

A scanner’s network selector matters. A clean result on Ethereum does not establish that the same account has no permissions on BNB Smart Chain, and vice versa.

Do not revoke blindly across a list

Check whether the permission exists and whether it remains needed. A tool may show historical approval activity even after current allowance is zero, or cover only some networks.

On each chain, a standard revocation generally needs a transaction and that chain’s supported fee payment. Do not send funds to an account with suspected key compromise merely to clear approvals without assessing the risk of immediate theft.

Signature permissions need their own review

ERC-2612 uses a signing domain intended to distinguish contract and chain context. That helps scope authorizations, but it does not turn one chain’s revocation into a universal signature cancellation.

Keep the confirmed revocation hash alongside the permission record. This makes later review precise and avoids declaring an entire wallet safe based on a single network’s result.