Bip39 Checksum. Then within a theft or threatening circumstance, you may give your attackers the recovery seed phrase (with no passphrase) and they might recover the wallet with out understanding you've got another wallet employing a passphrase Coin support must be perfectly documented or referenced around the wallet developer's Web https://linkdirectorynet.com/listings13031450/bip39-standalone-https-linktr-ee-bip39-the-5-second-trick-for-bip39-seed-generator