Important: The official Hedera Wallet is being deprecated on May 31st, 2021 — please read this blog posting for instructions on how to migrate to a third-party wallet. Please securely document your mnemonic phrase, private key, and account ID.

An "Invalid Signature" error indicates that your wallet has a configuration problem. This is typically due to a wallet being restored or upgraded and the incorrect account ID (or passphrase) is being used to complete this process. To resolve, follow the steps below:

1. Ensure that you have securely documented your passphrase, private key, public key, and account ID
2. Update to the latest version of the Hedera Wallet, if you have not already done so
3. Perform a “Master Reset”, which is the last item in the settings menu on the top-right
4. Restore your account with your passphrase and account ID

It is important that passphrases and account IDs be saved in safe and secure locations as they are critical to the restoration of a Hedera Wallet and accessing an account. It will be impossible to access an account without the proper passphrase and account ID.