Bip39 Passphrase. You'd probably then do a fundamental recovery which has a command such as one particular under. (This command makes use of a sample wallet file bunlded with BTCRecover) Any one else who discovers the phrase can steal the bitcoins. It have to be retained magic formula, for example https://worldsocialindex.com/story4203929/bip39-list-https-linktr-ee-bip39-the-single-best-strategy-to-use-for-bip39-wallets