The Problem Nobody Plans For
Every piece of security advice on this site pushes in one direction: make your crypto harder for other people to access. Hardware wallets. Seed phrases on paper, never digital. Passphrases. Multi-share backups across separate locations.
Follow all of it correctly and you create a second problem. If you die tomorrow, can anyone else get to it?
For a bank account, the answer is procedural. Your heirs produce a death certificate, the bank follows a process, and the money moves. There is a counterparty whose job includes exactly this.
For self-custody crypto there is no counterparty. No beneficiary designation, no “forgot password,” no institution to petition. There is a seed phrase somewhere, and either someone can find and use it or the assets stay on-chain forever, visible to everyone and spendable by no one.
An unknown but certainly large quantity of cryptocurrency is already permanently inaccessible for exactly this reason. Most of it belonged to people who intended to sort it out later.
This guide is about sorting it out now, without undoing your security in the process.
The Central Tension
Every inheritance mechanism for crypto trades against security along the same axis:
Anything that makes your assets recoverable by your heirs also makes them potentially recoverable by someone else.
A seed phrase your partner can find is a seed phrase a burglar can find. A passphrase documented clearly enough for your executor to use is documented clearly enough to be stolen. Instructions complete enough to be followed by a non-technical heir are complete enough to be followed by anyone who reads them.
This is not a problem you solve by being clever. It’s a problem you solve by separating the components across people, places and time, so that no single discovery is sufficient — while still being confident that the right combination will come together when it needs to.
The rest of this guide is structured around that principle.
Step 1: Document That the Assets Exist
Start here, because it’s the step most people skip and the one that causes the most permanent loss.
Your heirs cannot recover what they don’t know about. If your estate consists of a house, a pension and 2 BTC that nobody has ever heard of, the 2 BTC simply doesn’t exist as far as your family is concerned.
Write an asset inventory. This document should answer: what exists, roughly where, and who to ask for help. It should contain:
- That cryptocurrency holdings exist, and in broad terms what they are
- Which exchanges hold accounts in your name
- That hardware wallets exist, and where the devices are
- That recovery material exists, and who holds it or where the instructions are
- The name and contact details of someone technically competent who has agreed to help
It must NOT contain: your seed phrase, your passphrase, your private keys, or anything that would let the reader move funds.
The distinction is the whole design. The inventory is a map saying “there is treasure, and here is who holds the key.” It is not the key. A copy sitting in a desk drawer should be useless to a thief and invaluable to your executor.
Keep it current. An inventory listing an exchange that closed in 2026 and omitting the wallet you opened in 2027 is worse than useless. Review it annually, on a fixed date.
Step 2: Never Put Keys in Your Will
This deserves its own section because the mistake is common and the consequence is total.
In many jurisdictions, a will becomes a public document once it enters probate. In others it is accessible to a wide range of parties — beneficiaries, their lawyers, court officials, anyone contesting the estate. The Netherlands, Germany, France, the UK and most common-law jurisdictions all have processes where the content of a will is disclosed well beyond the immediate family.
A seed phrase written into a will is a seed phrase published to a courtroom.
Worse, the window is long. Probate can take months. During that time the document circulates, and anyone who sees it can empty the wallet — legally untraceable, practically unpunishable, and entirely irreversible.
What the will should say: that crypto assets exist, that they form part of the estate, who inherits them, and that access instructions are held separately by a named person or through a named mechanism. Your notary can draft this correctly. The will handles the legal transfer of ownership; a separate, private mechanism handles the technical transfer of access.
Step 3: Choose an Access Mechanism
Four approaches, from simplest to most robust.
Option A — Sealed instructions with a trusted holder
The simplest workable approach. Your seed phrase (and passphrase, separately) sealed and held by a person or institution you trust: a notary, a lawyer, a bank safe deposit box your executor can access, or a family member.
Strengths: easy to set up, easy for heirs to use, no technical knowledge required.
Weaknesses: a single point of both failure and trust. The holder can open it. The envelope can be lost, destroyed, or accessed by someone else with access to the same safe.
When it fits: modest holdings, high trust in the holder, and a strong preference for simplicity over sophistication. For many people this is genuinely adequate, and an adequate plan that exists beats a perfect plan that doesn’t.
Improve it cheaply: split the seed phrase and the passphrase between two different holders. Neither alone can do anything.
Option B — Multi-share backup (Shamir)
Hardware wallets including the Trezor Safe range support multi-share backup, which splits your recovery material into several shares, a threshold of which reconstructs the wallet.
A 3-of-5 configuration gives you a genuinely elegant inheritance structure: distribute five shares across a home safe, a bank deposit box, your notary, and two trusted people in different households. Any three reconstruct the wallet. Any two are worthless.
Strengths: no single point of failure, no single point of trust, resistant to both loss and theft. The same structure that protects against a home invasion protects against a dishonest executor.
Weaknesses: your heirs need to understand what they’re holding and how to combine it. A share, by itself, looks like a meaningless word list — several documented cases exist of families discarding recovery material because nobody recognised it.
Make it work: each share should be accompanied by a plain-language note explaining what it is, how many are needed, who holds the others, and who to contact for help. The note explains the mechanism; it does not contain other shares. Related: Seed Phrase Security Guide 2026 | How to Back Up & Protect Recovery Keys
Option C — Multisignature
A 2-of-3 multisig where you hold one key, a trusted person holds a second, and a third sits with a lawyer or a co-signing service.
During your life, you and the service sign. After your death, your heir and the trusted person can sign without you.
Strengths: the most robust option, and it serves double duty against coercion since no single key moves funds. Related: Crypto Has Gone Physical: Wrench Attacks, Home Invasions, and What European Holders Should Do
Weaknesses: genuinely complex. Setup errors are easy and consequential, and your heirs need meaningful technical competence or professional help.
When it fits: larger holdings where the complexity is proportionate, and where you have access to competent help.
Option D — Inheritance services and dead-man switches
A growing category of products and smart-contract mechanisms designed to release access after a period of inactivity.
Treat these with caution. You are introducing a third party, or a smart contract, into the most sensitive position in your entire security model, and relying on it to work correctly years from now — possibly after the company has been acquired, pivoted, or closed. Any service holding key material is a custodian, whatever it calls itself.
If you use one, use it as a supplement to a non-digital mechanism, not a replacement.
Step 4: Make Sure Someone Can Actually Do It
The failure mode nobody anticipates: a perfectly designed plan handed to someone who cannot execute it.
Your partner, holding a 24-word list and a note saying “restore this on a Trezor,” may have no idea what a Trezor is, where to get one, what “restore” means, or how to tell the official site from a phishing clone — at the exact moment they are grieving and vulnerable.
Three mitigations:
Write instructions for a specific person, not for a competent stranger. Name the device. Name the official website. State explicitly that nobody should ever be asked to type the recovery phrase into a web page, and that anyone asking for it is stealing. Say what the assets are worth in rough terms so they know whether to seek professional help.
Name a technical executor. Someone who understands crypto, who has agreed in advance, and whose role is to help — not to hold the keys. Your legal executor and your technical helper can be different people, and usually should be.
Test it. This is the step that separates plans that work from plans that look good. Walk through the recovery with the person who will do it, using a wallet holding a trivial amount. You will discover something broken: a missing share, an illegible word, a forgotten passphrase, a safe-deposit box your executor has no legal right to open. Find out now.
The Passphrase Problem
If you use a passphrase-protected hidden wallet — strongly recommended against coercion — understand what it does to inheritance.
A passphrase is not recoverable. If it is lost, the wallet it derives is gone permanently, even with the full seed phrase in hand.
Worse, it is invisible. Your heirs restoring from your seed phrase will find the standard wallet and its balance. They will have no indication that a second wallet exists holding considerably more. They won’t be looking for something they don’t know about, and nothing in the recovery process will tell them.
If you use a passphrase, the existence of the hidden wallet must be documented somewhere your heirs will find it — in your asset inventory, phrased as “there is a passphrase-protected wallet; the passphrase is held by [X]” — with the passphrase itself stored separately from the seed.
Seed with one holder, passphrase with another, existence documented in the inventory. That structure survives both a burglary and a death.
The Dutch and EU Context
A few jurisdiction-specific notes, since this site is written from the Netherlands.
Crypto is part of your estate. In the Netherlands and across the EU, cryptocurrency forms part of the deceased’s assets and is subject to inheritance tax (erfbelasting in NL) on the same basis as other property. It is valued at the date of death.
That creates a practical trap. Your heirs may face a tax liability on assets they cannot access, assessed on a valuation from a volatile market. If the plan fails, the estate can owe tax on crypto nobody can reach. This alone justifies doing the planning properly.
Notaries can hold sealed documents. Dutch notarial practice supports depositing sealed instructions, and equivalents exist across most EU civil-law jurisdictions. A notary is generally a better custodian than a family member: bound by professional duty, insured, and institutionally durable.
DAC8 increases visibility. From the 2026 reporting year, exchanges report holdings and transactions to tax authorities automatically. Your estate’s exchange holdings will be visible to the tax authority whether or not your family knows about them — which makes an undocumented self-custody position the specific thing that gets lost. Related: The First DAC8 Reporting Year Closes in December — What EU Crypto Holders Need to Do Now
Get the will drafted properly. This article is not legal advice and inheritance law varies substantially between member states. A notary who understands that crypto needs legal transfer and technical access handled separately is worth the fee.
A Minimum Viable Plan
If you do nothing else, do this. It takes an afternoon.
- Write the asset inventory — what exists, where, who holds access material, who to call. No keys in it.
- Tell one trusted person it exists and where to find it.
- Give your seed phrase, sealed, to a notary or a bank deposit box your executor can access. Keep your passphrase, if any, with a different person.
- Have your will state that crypto assets exist and who inherits them, with access handled separately. Never the keys themselves.
- Write one page of plain instructions for the specific person who will do the recovery, naming the device and the official website, and stating that nobody should ever ask them to type the phrase into a web page.
- Put a reminder in your calendar to review it annually.
That plan is not elegant. It is dramatically better than what almost everyone currently has, which is nothing.
Frequently Asked Questions
Can my family recover crypto from an exchange after I die?
Usually yes — exchanges have deceased-account procedures requiring a death certificate and proof of executorship. This is the one area where custodial actually beats self-custody, which is worth weighing for a portion of holdings.
What if I don’t trust anyone with my seed phrase?
Use multi-share backup so no single holder has anything usable. That’s exactly the problem it solves.
Should I tell my family how much crypto I hold?
Broad terms, yes — they need to know whether to seek professional help. Precise amounts create their own risks, including physical ones. “Significant, consult the person named here” is usually the right level.
Is a safe deposit box safe for a seed phrase?
Reasonably, with two caveats: confirm your executor will have legal access after death (not automatic in all jurisdictions), and don’t keep the only copy there.
What about the tax on inherited crypto?
It varies by member state and is generally assessed at date-of-death value. Consult a local tax professional — and ensure your heirs can actually access the assets they’ll be taxed on.
The Bottom Line
Self-custody transfers responsibility from an institution to you. That includes the responsibility institutions quietly handle at the end of every customer’s life.
The design principle is simple even if the implementation varies: split the components so no single discovery is sufficient, document the existence of everything without documenting the access, and test the recovery with the person who will have to do it.
This is not an urgent task. It is the kind of task that is never urgent until it is permanently too late, which is why so much crypto is already stranded on-chain, visible forever, belonging to nobody.
Spend an afternoon on it.
About the Author
N. Singh is the Founder and Editor-in-Chief of TrueToCrypto.com, based in the Netherlands, with over a decade in blockchain and fintech. He focuses on cryptocurrency security and practical self-custody.
Transparency: N. Singh holds cryptocurrency and uses Ledger and Trezor hardware wallets. TrueToCrypto may earn affiliate commissions from links in articles. This article is educational and is not legal, tax, or estate-planning advice. Inheritance law differs substantially between jurisdictions. Consult a notary or estate lawyer in your own country before relying on any structure described here.
Contact: info@truetocrypto.com
