---
title: "Mnemonic Seed Formats That Differ From BIP39 (PDF)"
url: "https://bip39-phrase.com/list-phrase/mnemonic-seed-formats-that-differ-from-bip39-2026-10-21/"
language: "en"
updated: "2026-10-21T00:00:00+00:00"
---

# Mnemonic Seed Formats That Differ From BIP39

Technical reference detailing non-BIP39 mnemonic phrase formats including Electrum, aezeed, Polyseed, and legacy Monero seeds.

PDF document · Published October 21, 2026 

[ Open the PDF (6 pages, 261 KB) ](/list-phrase/mnemonic-seed-formats-that-differ-from-bip39-2026-10-21-en.pdf) 

## Contents

1. Electrum Version 2.0+ Seeds
2. Lightning Network Daemon aezeed
3. Polyseed
4. Legacy Monero Mnemonics
5. FAQ
6. Sources
7. Example BIP39 word sequences
8. Reading a BIP39 phrase
9. See also

Keywords: 

Electrum seed · aezeed · Polyseed · Monero seed

Topic: 

[BIP Standards: BIP39, BIP32, BIP44 and Beyond](/topics/bip-standards/)

## Guides on the same subject

- [BIP85: Derive Many Seed Phrases From One Seed](/bip85/)  
How BIP85 derives independent child seed phrases, passwords and keys from one master seed: the path scheme, a verified test vector, wallet support and risks.
- [Monero Seed Phrase: 25 Words, Polyseed and Private Keys](/seed-phrase-and-private-key-format-of-monero-guide/)  
A Monero seed phrase is 25 words from Monero's own list that encode the private spend key; newer wallets use 16-word Polyseed. Neither works in BIP39 wallets.
- [Seed Phrase Formats by Network: BIP39 and the Exceptions](/seed-phrase-formats-by-network/)  
Bitcoin, Ethereum, Solana and Cosmos use BIP39 seeds, Cardano and Polkadot derive their own keys from BIP39 words, and Monero, TON and XRP use other formats.

One of the documents in the [Seed Phrase PDF Archive](/list-phrase/), listed on [archive page 12](/list-phrase/12/).