How to sign a message in Coinbase Wallet

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.

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?Get verified for your purchase. Use crypto to buy outright or prepare a lender-approved mortgage down payment. Choose proof of funds or lender asset documentation for your next step.