Bip39 wiki https://writeablog.net/ipennywpzc/the-ultimate-overview-to-offline-bip39-generators-remain-secure Because of how the BIP39 standard functions it is not adequate occasionally to write down just a seed phrase. It is also crucial what derivation route you have been utilizing. Occasionally when importing a seed phrase to a different wallet by another vendor, your seed won't build https://bookmarkspy.com/story21478252/generate-bip39-phrase-the-single-best-strategy-to-use-for-bip39-generator-https-dzen-ru-bip39-phrase-com