Seed phrases 101: backing up your wallet safely

If you take away one habit from getting started with self-custody wallets, make it this: understand your seed phrase and back it up properly before you need it.

What a seed phrase actually is

A seed phrase (sometimes called a recovery phrase) is a sequence of ordinary words — usually 12 or 24 — generated by your wallet when you first set it up. Behind the scenes, that sequence of words mathematically generates the private keys that control your funds. Anyone who has your seed phrase can recreate your wallet and access everything inside it, which is exactly why it has to be treated with real care.

Write the words down — on paper, never on a device

The most common mistake people make is storing a seed phrase digitally: a screenshot, a photo, a notes app, an email draft, a cloud drive. All of these put the phrase on a device that can be stolen, synced, backed up, remotely read, or simply left behind. The rule is simple: the 12 (or 24) words get written down by hand, on paper or on something more durable — like a metal backup card — and stored somewhere private and secure, away from the device itself.

There is exactly one exception, and it's hardware built for this purpose. A hardware wallet keeps your keys inside a dedicated offline device rather than a general-purpose computer — and even then, the words themselves still get written on paper. What never works as digital storage: no phone camera, no chat message, no cloud note, no file on your computer.

Never type it into a website

A legitimate wallet will only ever ask for your seed phrase inside the wallet app itself, typically during setup or recovery. If a website, email, or message ever asks you to "verify" your wallet by entering your seed phrase, that's a scam, every time, with no exceptions.

What happens if you lose it

If your device is lost, stolen, or breaks, your seed phrase is the only way to recover your funds on a new device. Without it, access to that wallet is gone permanently — there's no customer support line that can reset it for you, because nobody but you controls it. That's the trade-off of true self-custody: total control, and total responsibility for your own backup.