Permit signature

A gas-free signature that can approve an app to spend your tokens, often abused by scam sites.

Some tokens and apps support permits: instead of an on-chain approval transaction, you sign a message that grants the spending permission. It costs no gas, so it can feel harmless.

Scam sites take advantage of this by asking you to "sign in" or "claim" with a signature that is really a permit. Read what your wallet shows before you sign anything on an unfamiliar site.