Bip39 Passphrase Generator. Then in the theft or threatening scenario, you can give your attackers the recovery seed phrase (without the passphrase) and they may Get well the wallet without figuring out you may have One more wallet using a passphrase This in depth guideline summarizes the usefulness as well https://linkdirectorynet.com/listings13053363/bip39-passphrase-generator-https-linktr-ee-bip39-not-known-details-about-bip39-online