Invalid Mnemonic Phrase: Why Your Wallet Rejects It and How to Fix It

You entered all your recovery words and the wallet answered with “invalid mnemonic phrase” or “invalid recovery phrase.” Every word is right there on your paper, and the wallet still refuses. A rejected phrase isn’t necessarily a lost phrase: the cause can be as small as a misread word or a stray space, so it’s worth understanding what the wallet is actually checking before you change anything.

What your wallet checks before it accepts a phrase

The rejection is math, not a glitch. A BIP-39 recovery phrase encodes random data together with a checksum, whose bits are stored in the last word. When you enter the phrase, the wallet recalculates that checksum. A mismatch produces a validation error before the wallet looks for addresses on the blockchain.

A wrong word or swapped words can cause this check to fail, but not every mistake does: a different valid phrase can pass and derive a different wallet. The checksum alone cannot identify the wrong word or confirm that the phrase belongs to your original wallet. A validation error in the app does not change your balance on the blockchain.

The exact wording varies by app. Trust Wallet shows “Invalid mnemonic phrase”; Electrum’s BIP-39 restore shows “BIP39 checksum failed”; other wallets say “invalid recovery phrase” or “invalid seed.” Different labels, same check, same fixes.

Before you change anything

Keep the original written backup unchanged and make a separate paper copy for your checks. Do not photograph the phrase. People start “correcting” words on the original paper, and an hour later nobody can tell which version was the original. Do your checking against the printed BIP39 word list, on paper or on your own screen: no legitimate checker asks you to type a recovery phrase into a website, and fake ones exist for exactly that reason.

Rule out typing problems first

Start here because it costs nothing. Wallets can be strict about how the words arrive, and a phrase that’s perfectly correct on paper can still fail on the screen:

• Type every word in small letters. The official word list is all lowercase, and a phone’s auto-capitalize quietly breaks the first word.
• Put exactly one space between words, and none before the first word or after the last. A pasted phrase can carry an invisible trailing space or line break.
• Turn off autocorrect, or watch it closely: it swaps real list words for lookalikes as you type. Some wallets mark a word that isn’t on the list, so slow down and look for it.
• Set your keyboard to English if your phrase uses English words.
• If the restore screen asks for the phrase length first, match it to your backup. A screen set to 24 words won’t take a 12-word phrase.

MetaMask’s help article on the “Invalid Seed Phrase” error boils it down to three rules: the exact original order, one space between words, and all lowercase. Enter the phrase again, slowly, one word at a time. If it still fails, the cause lies in the backup or in the wallet you’re restoring into: work down the list below.

The common causes and how to fix each one

Each cause has its own fix. Work through them in order: the first two can leave every word on the paper looking legitimate, so they are the easiest to miss.

A misread word. Handwriting turns “wagon” into “wage” and “crush” into “crash.” Both halves of each pair are real BIP-39 words, so the phrase looks fine and still fails. Start by checking every word, one at a time, against the official list of 2,048 English BIP-39 words. No two words on that list share the same first four letters, so a word with a smudged ending can be identified from its first four letters. If a word on your paper isn’t on the list, you’ve found the problem. If every word is on the list, a misread may still be hiding behind a valid word; that case is covered right after this list.

Two words in swapped positions. Order matters as much as the words themselves. The workable news: if you suspect a swap in a 12-word phrase, there are only 66 possible pairs to exchange. That’s a small, methodical test, not a search problem: the checksum rejects most wrong orders, and an old receiving address confirms the right one. If more than two words may be out of place, see our page on a recovery phrase in the wrong order.

The wrong number of words. Count them. A valid BIP-39 phrase has 12, 15, 18, 21, or 24 words. Thirteen means an extra word slipped in while copying, or that a passphrase was written down next to the phrase; a passphrase is entered separately, never as one of the words. Thirteen words can also be a genuine Electrum seed: Electrum versions 2.0 to 2.6 usually created 13-word seeds. Eleven means a word is genuinely gone — that’s no longer a diagnosis problem but a reconstruction problem, covered step by step in our missing-word guide. A 20- or 33-word backup points to a different standard, SLIP-39: newer Trezor models create a 20-word backup by default. SLIP-39 uses its own 1,024-word list and won’t restore in a BIP-39 wallet, so restore it on a Trezor or in software that supports SLIP-39.

The wrong language. BIP-39 has official word lists in ten languages, including Spanish, French, Italian, and Japanese. A phrase generated from the Spanish list won’t validate against the English one, even though every word looks legitimate. If your wallet was set up in another language, switch the restore screen or tool to that language’s list. Don’t translate the words into English: the BIP-39 standard notes that translating a phrase into another word list creates a completely different seed. Many wallets accept only the English list, so you may need software that supports your phrase’s language.

The right phrase for the wrong wallet. Electrum generates its own seed format, which is different from BIP-39. Its seeds use the same 2,048 English words but carry a version number instead of a BIP-39 checksum, so a BIP-39 wallet usually rejects an Electrum seed, and one that happens to pass opens a different, empty wallet. Electrum can also restore a BIP-39 phrase: on the seed screen, click Options and choose BIP39 seed. For that route, choose the Bitcoin account, address type and derivation path used by the original wallet. Download Electrum only from electrum.org.

A phrase from a different wallet than you think. People who’ve used crypto for years may have more than one backup: an old test wallet, an exchange note, a phrase from a wallet they emptied in 2021. Check the date and any label on the paper before assuming it belongs to the wallet with your funds. And if you originally added the wallet by importing a private key — a single long string of letters and numbers, not words — then no recovery phrase for it exists. You restore that wallet with the key itself.

Every word checks out and it still fails

Then the likeliest remaining explanation is a single wrong word that happens to be a valid list word, sitting in a position you can’t identify. That’s a bounded search, not a dead end: filling one unknown position works the same way as recovering one missing word, and the numbers behind that search are laid out in the missing-word guide.

The phrase is accepted but the balance shows zero

Passing the checksum does not prove that you have the original phrase. A zero balance can result from a different valid phrase, a missing or different passphrase, or an address-type, account or network setting. The derivation path also matters: it is the route from the phrase to the wallet’s addresses. Look up an old receiving address on a public explorer such as mempool.space first, then compare it with the restored wallet’s addresses. A balance at the old address confirms that funds remain there; it does not prove that the restored wallet has the keys to spend them. More causes and checks are on our page about a zero balance after restore.

What wallet support can and can’t do

Trust Wallet, MetaMask, and other self-custody wallets work the same way: the company never has access to your phrase, so it can’t look yours up and can’t repair it. Support can explain the app. The phrase is yours alone.

That design is also why forums around this error crawl with fake helpers. Anyone who messages you offering to “validate” or “synchronize” your phrase — in a DM, a form, or a “support” chat — is trying to steal it. Do not give your recovery words to any person, for any reason.

When no fix exists

If the phrase was never the right phrase, no correction will help. A seed from a test wallet you abandoned, or a backup that belongs to a different wallet than the one holding your coins, can be made to validate and will still open the wrong door. When the words aren’t a slightly damaged version of the right ones, there’s nothing to repair — and we’d rather say that plainly than let you spend weeks polishing the wrong key.

Once it validates: make the backup unambiguous

The failure you just fixed started at the moment of writing down. Rewrite the phrase in block capitals, number every position, note the word count and the language of the list, and check each word against the official list as you write. Block capitals are for the paper; type the phrase in lowercase when you enter it in a wallet. Paper fades and tears, and our backup guide covers how to store a backup that outlives it.

Need help with an invalid mnemonic phrase?

If you’ve worked through every cause and the phrase still won’t validate, start with a free assessment: describe your situation, and you’ll get an honest answer on whether the error is findable, before any commitment. No recovery, no fee, and we never touch your funds. If the search finds the error, you restore the wallet with the corrected phrase yourself, move the coins to a new wallet you created, and pay the agreed fee separately, per your written agreement.

FAQ: invalid mnemonic phrase

Why does my wallet say “invalid mnemonic phrase”?

A BIP-39 phrase includes a checksum stored in part of its last word. A wrong or swapped word can make that check fail, without identifying which word is wrong. Not every error is caught: a different valid phrase can pass the check and derive a different wallet.

Why does my wallet reject my recovery phrase if every word looks correct?

Because a word can look correct and still be wrong. Handwriting can turn one valid list word into another, such as “wagon” into “wage,” and two words can sit in swapped positions. The phrase may also come from another language’s word list or from Electrum’s own seed format, or an extra space or capital letter may have slipped in while typing. The wallet only knows that the checksum failed, not which word caused it, so compare each word, in order, against the official word list your wallet uses.

Can a wrong word in my seed phrase be found?

Yes, as long as only one word is wrong and you have a way to recognize your wallet, such as one of its old receiving addresses. Every position comes from the fixed 2,048-word BIP-39 list, and the checksum eliminates most wrong candidates before anything is tested. A single wrong word is a bounded search; the numbers are the same as recovering one missing word.

Can I restore my wallet if I only have 11 of 12 recovery words?

Yes, as long as the 11 words you have are correct and in the right order. If you know which position is empty, there are 2,048 candidates for it, and the 12-word checksum rules out about 15 of every 16, leaving roughly 128 complete phrases to test against one of your old receiving addresses. If you don’t know which position is empty, the search covers all 12 positions and is still small for recovery software. Crypto Recovers works with phrases missing up to four words.

Why does my wallet show a zero balance after accepting my recovery phrase?

A zero balance doesn’t by itself mean the phrase is wrong, and an accepted phrase isn’t necessarily your original phrase. Check an old receiving address on a block explorer and compare it with the restored wallet’s addresses. A different valid phrase, passphrase, derivation path, address type, account or network can explain the mismatch.

Can the wallet company recover my phrase for me?

No. Self-custody wallet companies never have access to your phrase, so support has no copy to look up and cannot repair it. Anyone who messages you offering to “validate” or “synchronize” your phrase is trying to steal it.

My phrase is from Electrum. Why does a BIP-39 wallet reject it?

Because an Electrum seed isn’t a BIP-39 phrase. It uses the same English words but carries a version number instead of a BIP-39 checksum, so a BIP-39 wallet usually rejects it, and one that happens to pass opens an empty wallet. Restore it in Electrum or other compatible software. Electrum also imports a BIP-39 phrase through its BIP39 seed option; the Bitcoin account, address type and derivation path must match the original wallet.