Bip39 Checksum. You would then do a basic Restoration which has a command like the 1 down below. (This command works by using a sample wallet file bunlded with BTCRecover) And you should have created it down should you have been hoping to keep a possibility open up to restore https://getsocialselling.com/story4051243/bip39-mnemonic-https-linktr-ee-bip39-an-unbiased-view-of-bip-39