Recovery phrases · Missing words
I lost one word of my 24-word seed: can it be recovered?
Almost always yes, and not because of a powerful computer. Your wallet’s word list comes with a built-in kind of spell-check that instantly throws out nearly every wrong guess. So if one word is missing, it is usually recoverable; with two it is harder; with three, it depends on what else you remember.
What that list of words really is
When you created the wallet, the app gave you twelve or twenty-four words and asked you to write them down. That list is not just another detail: it is the master key. With it the wallet can be opened again in any app and on any device; without it, it cannot. That is why whoever holds it gets in, and why you are told to keep it safe and never show it to anyone.
How that list is built explains almost everything else.
- The words come from a fixed dictionary. Not just any word will do: only 2048 are allowed. If one of yours is not on that list, it is misspelled. That is not a problem: it is a clue.
- The phrase corrects itself. The list has a kind of spell-check built in: out of every 256 combinations of words, only one fits. That filter is instant and works offline. It is exactly what lets one word be missing and the wallet still be recovered.
One word missing
The computer tries all 2048 possible words in the gap. The built-in check leaves only a handful of phrases that truly fit — about eight — and of those, only one actually holds your money. Checking which one takes seconds. There is no mystery to this case: it is easy.
Two missing, or you don’t know where
Still doable; there are simply more combinations to go through. It helps a lot to remember which position the word was missing from and, above all, which app you created the wallet with: it narrows down where to look enormously.
| What is missing | Roughly how much to try | Can it be done? |
|---|---|---|
| 1 word | a few thousand | Yes, easily |
| 2 words | millions | Yes |
| 3 words | billions | Sometimes, if you remember more |
| The whole phrase | a number too big to picture | No |
Look at the last row. Losing the whole phrase is not «a very hard case»: it is like having to pick one specific grain of sand out of all the beaches on Earth, and vastly more than that. No computer in the world can do it. That is why a completely forgotten phrase is never recovered, and why the rows above it are worth working on.
What really helps
Two pieces of information change the case completely. First, which app you created the wallet with (MetaMask, Electrum, Trust Wallet, a hardware device…): each one stores things its own way, so knowing it narrows down where to look enormously. Second, an address of yours from that wallet: if you have it, the work stops being «search blind» and becomes «check against something known», which is immediate. That is why the study asks for these two things: not curiosity, but what divides the work.
What does leave a case with no way out
- A forgotten extra password. Some wallets let you add a password on top of the words (sometimes called a «passphrase» or «25th word»). It is not part of the list, it does not self-correct and it leaves no trace: each one creates a different wallet. If you forgot it entirely, the right phrase is not enough.
- The order completely lost. If you have no idea of the order of the words, the combinations explode. It is only workable if the mix-up is contained: two words swapped, two lines switched, a column read backwards.
- Three or more words missing with no other clue. From there, each missing word multiplies the work by two thousand.
- Not being able to prove the wallet is yours. Without that I do not start, however easy the case.
How a case like this is worked
- You prove the wallet is yours: an address with history you can point to, the purchase receipt or emails from the app.
- The set of possible phrases is rebuilt using the built-in check, locally and offline.
- The chain is searched for the one holding your funds, starting from the app you used.
- You are handed the complete phrase. You create a new wallet and move the money; I delete the copies and confirm it to you in writing.