Invalid permit nonce after signing a swap

A permit nonce protects a signature authorization from reuse. It is not the same counter as the account transaction nonce used to order ordinary EVM transactions. Changing wallet nonce settings is therefore not the normal fix for an invalid permit nonce.

ERC-2612 requires a permit’s nonce to match the token contract’s current nonce for the owner. Successful submission advances that permit nonce. Permit2 uses scheme-specific nonce handling, so identify the actual request before applying a remedy.

Look for prior submission

Check whether the same signature was used by an earlier transaction. Another tab, route attempt or relayed submission may already have consumed it. The approval could have succeeded even if a separate swap later failed.

Compare the owner, token or verifying contract and chain. Reading the nonce for the wrong account or contract can create a misleading mismatch.

Restart from current state

Refresh the genuine application, let it check the current permission and generate a new request if needed. Review the new authorization’s economic fields rather than treating it as an identical retry.

If the mismatch continues, send support the public transaction evidence and error text. Avoid posting the signed permit itself: a still-valid signature can be actionable by another party. The useful question is whether the authorization was already consumed, invalidated or constructed for different state.