How to Back Up a Seed Phrase the Right Way
A seed phrase backup is the only way to recover a self-custody wallet. Learn how to write, store and test your backup safely, and the mistakes to avoid.
The right way to back up a seed phrase is to write the words by hand, in order and spelled correctly, on paper or a metal backup, keep it offline in at least one secure location you control, and test that it restores the wallet before you send serious money to it. Never type it into a website, photograph it, or store it in email or cloud notes.
A seed phrase (also called a recovery phrase or mnemonic) is usually 12 or 24 words generated by your wallet. It is the master key to your funds. If your phone breaks or your hardware wallet is lost, the phrase lets you restore everything. If someone else gets it, they can take everything. A good backup has to protect against both problems at once.
Why Your Seed Phrase Backup Matters
In self-custody there is no "forgot password" button. The wallet app or device is just a tool; the seed phrase is the actual key. Our explainer on what a seed phrase is covers the technical details, but the practical rule is simple: whoever has the words has the money. See also: What Is a Crypto Wallet? We cover this in more detail in BIP39 Explained.
That creates two failure modes:
- Loss. The backup is destroyed, misplaced or unreadable, and the device fails. The funds are gone for good.
- Theft. Someone finds, photographs or tricks you into revealing the words. They can drain the wallet from anywhere in the world.
A good backup plan addresses both. Related reading: How to Create a Strong Crypto Security Routine.
Step-by-Step: Backing Up a Seed Phrase
- 1Prepare in private. Set up the wallet somewhere no one can see your screen and no camera is pointed at you.
- 2Use the wallet's official recovery card or plain paper. Write each word clearly in pen, numbered in order.
- 3Check spelling against the screen. Many wallets use a standard word list in which the first four letters of each word are unique. Even so, write full words to avoid confusion.
- 4Do not type the words anywhere except into the wallet itself when restoring. No notes apps, no password-protected documents, no messages to yourself.
- 5Complete the wallet's verification step, where it asks you to confirm certain words.
- 6Test a restore. Before sending real funds, wipe or reset the wallet (or use a second compatible wallet) and restore it from your written words. Confirm the first receiving address matches.
- 7Make it durable. Transfer the words to a metal backup if you hold meaningful amounts. Paper burns, fades and gets water-damaged.
- 8Store it securely in a place only you, and anyone you deliberately trust, can access.
Where to Store a Seed Phrase Backup
There is no perfect location, only trade-offs. Think about who can get to it and what could destroy it.
| Option | Protects against | Weaknesses |
|---|---|---|
| Paper at home, in a hidden spot | Online attacks | Fire, water, burglary, being thrown away by accident |
| Metal plate or capsule at home | Online attacks, fire, water | Burglary; still needs a hiding place |
| Home safe | Casual theft, some fire protection | Safes are the first place burglars look |
| Second copy at a trusted second location | Single-site disasters | One more place it could be found |
| Bank safe deposit box | Theft and disasters at home | Access hours, institutional rules, possible outside access |
For larger holdings, people often combine a metal backup with copies in two separate places. Our guide to steel seed phrase backups compares metal options. We cover this in more detail in How to Protect Your Crypto from Hackers. Our article Password Managers and Crypto expands on this point.
Advanced Options for Larger Holdings
If a single copy of your phrase feels like too much of a single point of failure, there are more advanced tools:
- A passphrase ("25th word"). Some wallets let you add an extra secret word on top of the seed. Someone who finds your seed alone cannot access the funds. But if you forget the passphrase, you lose access too. See our explainer on passphrases.
- Shamir backup. Some wallets can split the backup into several shares, where only a set number are needed to recover. Our article on Shamir backup explains how it differs from cutting a phrase in half.
- Multisig. A wallet that needs several separate keys to sign. It removes the single-seed risk but adds complexity.
Only use these if you understand them well. Complexity you can't manage is its own risk. See also: Physical Security for Crypto Holders.
Common Seed Phrase Backup Mistakes
- Photos and screenshots. Phones sync images to the cloud automatically.
- Saving it in a password manager or email draft. Convenient, but now your seed is only as safe as that account.
- Splitting the words in two halves. Each half drastically reduces the work an attacker needs to guess the rest. Use proper Shamir or multisig instead.
- Never testing the backup. A single wrong word can make the backup useless, and you only find out when you need it.
- Laminating paper only. Lamination doesn't stop fire.
- Telling no one anything. If something happens to you, your family may not know the funds exist. Read our guide to inheritance planning for crypto.
Seed Phrase Safety Rules to Remember
- Real wallet support will never ask for your seed phrase. Anyone who does is a scammer; see our article on seed phrase scams.
- Only enter the phrase into the wallet device or app when you are restoring, and only after downloading the wallet from its official source.
- If you suspect the phrase was exposed, create a new wallet with a new seed and move the funds immediately.
Bottom line
A seed phrase backup should be handwritten, offline, durable and tested. Protect it against fire and loss as carefully as against theft, keep it away from cameras and the internet, and make sure someone you trust knows how to find your plans. A few careful steps today prevent the two most permanent ways to lose crypto.
Frequently asked questions
Should I store my seed phrase in a password manager or the cloud?
Most security guidance advises against it for meaningful amounts. Anything stored on an internet-connected device or cloud account can be exposed by malware, a data breach or an account takeover. An offline backup on paper or metal, kept somewhere private and secure, removes those attack paths entirely.
How many copies of my seed phrase should I keep?
Many people keep two copies in separate secure locations, so a single fire, flood or burglary cannot destroy every copy. Each extra copy is another place it could be found, so balance the risk of loss against the risk of theft and keep every copy as protected as the first.
Can I take a photo of my seed phrase?
It is not a good idea. Photos are often synced automatically to cloud services and can be accessed if your phone or account is compromised. Malware can also scan image libraries for seed phrases. Write it down by hand instead.
What happens if I lose my seed phrase but still have my wallet?
Your funds are still accessible while the wallet device or app works, but you have no backup. Move the funds right away to a new wallet with a fresh seed phrase that you back up properly, rather than relying on a device that could fail at any time.