Vault12 uses Shamir Secret Sharing and trusted Guardians to create a mobile-first Bitcoin inheritance system. This 2026 review covers pricing ($99/year), security model, how the inheritance event actually works, and comparison to Casa and Cipherwill.
Most Bitcoiners have a plan for accumulating. Far fewer have a plan for what happens to their Bitcoin when they die.
Unlike a bank account, there is no customer service line to call, no account recovery process, no institution that will recognize a death certificate and transfer funds. Bitcoin requires active planning — without it, your Bitcoin may be permanently inaccessible after you're gone.
This is the practical checklist. Complete these 10 steps and your heirs will be able to access your Bitcoin. Skip them and they probably won't.
Why Bitcoin Inheritance Is Different
A traditional investment account has a clear inheritance path: name a beneficiary, they contact the brokerage, present a death certificate, and receive the assets. The institution holds the assets and knows how to transfer them.
Self-custodied Bitcoin has none of this. The Bitcoin lives on the blockchain, accessible only through private keys. The private keys live in a hardware wallet, protected by a seed phrase that only you know. If you die without passing this information on:
- The hardware wallet is useless without the seed phrase
- The seed phrase is useless if heirs don't know it exists
- The Bitcoin is permanently inaccessible — there is no recovery option
This has already happened many times. The Chainalysis estimate puts the amount of permanently inaccessible (likely lost/dead owner) Bitcoin at over 3 million BTC.
The 10-Step Bitcoin Inheritance Checklist
Step 1: Inventory All Your Bitcoin
Before you can plan inheritance, you need a complete picture of where your Bitcoin is.
Create a Bitcoin inventory that includes:
- Exchange accounts (name, URL, email used, approximate balance)
- Hardware wallets (make, model, location, approximate balance)
- Software wallets (app name, device, approximate balance)
- Bitcoin ETF or fund holdings (brokerage account, ticker)
- Bitcoin IRA accounts (provider, account number)
- Any loaned or custodied Bitcoin (platform, terms)
Store this inventory securely — it should not include private keys or seed phrases (those come later), just enough information that an executor can identify what exists and where.
Do not store this inventory digitally in a way that's easily accessible — it's a roadmap to your Bitcoin. A sealed envelope in a fireproof safe or with an attorney is appropriate.
Step 2: Create a Letter of Instructions
A Letter of Instructions is a plain-language document that tells your heirs what to do, step by step. This is not a legal document — it's a practical guide.
Include:
- The existence and approximate value of your Bitcoin
- Where to find the Bitcoin inventory (from Step 1)
- What a hardware wallet is and that the device is not the Bitcoin
- That they need the seed phrase, not just the device
- Where to find the seed phrase backups
- Any passphrase (BIP39 25th word) and where to find the hint
- Who they can contact for help (a trusted Bitcoin-literate friend, an attorney who knows Bitcoin, or a service like Unchained)
- Basic instructions on how to access the wallet software
Write this assuming your heirs have never seen a hardware wallet. Do not assume any Bitcoin knowledge.
Store it: With your will, with your attorney, or in a sealed envelope alongside your seed phrase backup.
Step 3: Secure Your Seed Phrase Backups
The seed phrase is the master key to your Bitcoin. Your heirs need access to it after you die but must not be able to access it prematurely (before your death).
Best practices for inheritance-ready seed phrase storage:
- Metal backup (not just paper) — Cryptosteel Capsule, Billfodl, or Blockplate — fire and flood resistant
- At least two copies in geographically separate locations
- Sealed and tamper-evident — so you'll know if someone has accessed it
- One copy accessible to your estate — consider leaving one copy with your attorney in a sealed envelope, to be opened only upon verified death
Never: Store seed phrases digitally. Never email them, take photos, or store in a password manager that heirs might access while you're alive.
Step 4: Address the Passphrase (25th Word)
If you use a BIP39 passphrase (an extra word beyond your 12 or 24-word seed), your heirs need it too — but you don't want it stored alongside the seed phrase (that would defeat the security purpose).
The approach:
- Store the passphrase separately from the seed phrase
- Leave written instructions that a passphrase exists and a hint for it (not the passphrase itself)
- Consider: tell a trusted person the passphrase verbally, who can share it only upon your verified death
- Or use a time-locked Shamir Secret Sharing scheme to encode the passphrase
A locked hardware wallet with no passphrase is accessible if someone finds the seed phrase. A passphrase without the seed is useless. Keep them separate — but ensure both are ultimately recoverable.
Step 5: Consider Multisig for Large Balances
For substantial Bitcoin holdings (roughly $100k+), a multisig wallet offers a cleaner inheritance path than a single-sig wallet.
A 2-of-3 multisig designed for inheritance:
- Key 1: You hold (hardware wallet + seed)
- Key 2: Attorney or professional custodian holds
- Key 3: Heir or trusted family member holds (can be sealed until needed)
Upon death, the heir and attorney combine their keys (2-of-3) and move the Bitcoin. You never needed to give a single person complete access.
Services like Unchained and Casa offer inheritance-ready multisig setups with dedicated protocols for key recovery after death. This is the professional standard for serious Bitcoin estates.
For setup instructions, see our multisig guide.
Step 6: Update Your Will
Your legal will should reference your Bitcoin holdings, even if it doesn't list seed phrases (which shouldn't be in public legal documents).
What your will should include:
- Recognition that you hold Bitcoin (specific or general)
- Direction to your Letter of Instructions for access details
- Named executor who has been briefed on the process
- Specific beneficiary designation for Bitcoin
What your will should NOT include:
- Seed phrases (wills can become public documents in probate)
- Private keys
- Specific wallet addresses
Get legal help: An estate attorney familiar with digital assets can draft appropriate language. Several Bitcoin-focused attorneys specialize in crypto estate planning. The cost is modest relative to the asset value at stake.
Step 7: Name a Knowledgeable Executor or Trustee
The person executing your estate needs to understand (or be able to learn) how Bitcoin works. A general estate attorney or family member with no Bitcoin experience may be unable to navigate the process even with good instructions.
Options:
- Name a Bitcoin-literate friend or family member as executor
- Designate a professional Bitcoin custodian (Unchained, Casa) as part of your estate plan
- Brief your chosen executor in advance — show them how to use your wallet software
- Leave contact information for a Bitcoin-literate advisor they can call
Consider a trust: For large estates, a trust structure can hold Bitcoin assets and distribute them according to your terms without going through probate. A Bitcoin-specific trustee (some law firms specialize in this) can manage the technical side.
Step 8: Plan for Exchange-Held Bitcoin
Bitcoin on exchanges (Coinbase, Kraken, Swan, River) follows standard exchange inheritance processes, but you need to facilitate this:
- Name beneficiaries: Most exchanges allow beneficiary designations — set them up
- Document account access: Include email, username, and any authentication info in your secure inventory (but not passwords directly — point to a password manager your executor can access)
- Recognize the process: Heirs will need a death certificate and to follow the exchange's specific inheritance procedure — each exchange handles this differently
- Be aware of 2FA: If your 2FA is on a device that will be inaccessible, plan for this in advance (backup codes stored with your estate documents)
For Bitcoin ETF or IRA holdings, standard brokerage beneficiary designations apply — the simplest Bitcoin inheritance path.
Step 9: Test the Plan
Don't assume your instructions are clear — test them.
- Have a trusted person read your Letter of Instructions without any help from you. Can they understand what to do? Where things are?
- Do a simulated recovery: Take a hardware wallet, your written seed phrase backup, and go through the restore process without help. Confirm it works
- Verify all locations: Physically confirm that every item mentioned in your instructions is where you say it is
A plan that exists only in theory is not a plan. Test it.
Step 10: Review and Update Annually
Bitcoin inheritance planning is not a one-time task. You need to update it when:
- You acquire new Bitcoin or open new accounts
- You change wallets, seed phrases, or passphrases
- Your designated executor or beneficiary changes
- Bitcoin's value changes significantly (impacts estate tax planning)
- Laws change (digital asset estate law is evolving rapidly)
Set a calendar reminder to review your Bitcoin inheritance plan annually.
Quick Reference: Bitcoin Inheritance Checklist
- Complete Bitcoin inventory (all accounts, wallets, and holdings)
- Letter of Instructions written and stored with estate documents
- Seed phrase backed up on metal (not just paper)
- Second seed backup in separate location
- Passphrase (if used) is separately accessible with clear instructions
- Multisig setup for holdings over $100k
- Will updated to reference Bitcoin holdings
- Executor briefed and capable of navigating Bitcoin
- Exchange accounts have beneficiary designations set
- Plan tested and confirmed working
- Annual review scheduled
Professional Services for Bitcoin Inheritance
If the DIY approach feels daunting, professional services can help:
Casa — Offers inheritance-ready multisig with a dedicated inheritance protocol. Heirs work directly with Casa to recover Bitcoin after death verification.
Unchained — Collaborative multisig with estate planning services. Unchained can serve as one key holder in an inheritance-ready setup.
Liana Wallet — Open-source wallet that uses Bitcoin timelocks for inheritance. After a defined period of inactivity (e.g., 1 year), a designated recovery key becomes active. No third party required.
For a full comparison of inheritance methods, see our Bitcoin inheritance planning guide.
Frequently Asked Questions
What happens to Bitcoin when someone dies with no plan? If no seed phrase is accessible, the Bitcoin is permanently inaccessible. There is no recovery process. It remains on the blockchain but can never be moved. This is true regardless of the value involved.
Should I give my seed phrase to my spouse right now? This depends on your threat model. The safest approach is a structured access method (sealed envelope with attorney, multisig, or time-locked wallet) rather than direct sharing, which creates a single point of failure and potential security risk if the relationship changes or the other person is targeted.
Can I leave Bitcoin in a will? Yes — your will can direct that Bitcoin assets pass to a specific beneficiary. The will should reference your Letter of Instructions for access details rather than containing seed phrases directly (wills can become public in probate).
What is a Bitcoin inheritance attorney? An estate attorney who specializes in or has experience with digital asset inheritance. They can draft appropriate will language, advise on trust structures, and understand the technical requirements. Several Bitcoin-focused law firms have developed estate planning practices specifically for Bitcoin holders.
Is a Bitcoin IRA easier to inherit? Yes. A Bitcoin IRA follows standard IRA beneficiary designations — name a beneficiary, they contact the IRA custodian with a death certificate, and the account transfers. This is the simplest Bitcoin inheritance path and one reason to consider a Bitcoin IRA even if you primarily self-custody.