How to sign a message in Coinbase Wallet

How to sign a message in Coinbase Wallet (the self-custody app) to prove wallet ownership for verification — no funds move and your keys stay private.

Coinbase Wallet (the self-custody app) can sign a verification message to prove you control an address — no funds move and your keys stay private.

How it works

  1. Start the signing request from the verification flow; Coinbase Wallet receives it.
  2. A signing prompt appears showing the message to sign.
  3. Read the message and confirm it's a verification message you initiated.
  4. Approve to produce the signature, or reject if anything looks wrong.

Safety

  • Only sign requests you started from a flow you trust — malicious signature requests are a common phishing method.
  • A verification message should be readable. Be wary of signing opaque data.
  • Signing a message never moves funds; approving a transaction does. Confirm you're signing, not sending.

For the current signing UI, see Coinbase Wallet's official support documentation.

Ready to verify your funds?Turn your crypto into a proof-of-funds letter sellers accept — and close as a cash buyer.