The answer
Yes. A valid signed permit can be submitted by another party, setting an ERC-20 allowance on-chain using the owner’s signature and nonce. The submitting party pays transaction costs.
What to do next
Check the spender, value and deadline in any permit signature; avoid approving unknown dApps.
Ethereum ERC-2612 standard
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Ledger hardware wallet
Relevant hardware-backed signing for supported assets; it does not eliminate gas fees, contract vulnerabilities or approval risks.
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Frequently asked questions
Is signing a permit automatically harmless because no gas is charged?
No. It can authorize later spending of the approved token amount.