List B Document I9. From this point forward the seed might be published on paper or spoken in excess of phone which opened up new, physical means of backing up the seed (various paper copies in several locations, long lasting copies on metallic plates with further protection from hearth/flood etc.). https://laneozjvf.wikiconversation.com/6881397/the_anatomy_of_a_bip39_phrase_entropy_words_and_stability