An executor cannot administer what they cannot find, and cannot reach self-custodied crypto without the keys. Yet the keys are the asset, and whoever holds them holds the money. The task is to convey access that arrives on time and not a day before — and that begins by separating two questions that look like one.
The instinct, once a person starts to plan, is to write the seed phrase somewhere a family member will eventually read it. The will is the obvious place; it is the document that speaks at death and the one the executor is sworn to follow. That instinct is wrong, and the reason is procedural rather than technical. A will offered for probate in New York becomes a public court record. Anything written inside it — a private key, a seed phrase, the recovery words for a hardware wallet — is exposed to anyone who reads the file, and a key that has been published is a key that has been surrendered.
The way out is to stop treating the problem as a single thing. There are two separate questions, and they want two separate answers. The first is whether the executor knows the crypto exists and where to look for it. The second is whether the executor can move it once they are there. The first is information that belongs in the estate plan; the second is a secret that must never sit in a public document and must arrive only when the authority to use it does. This note is the narrow practical question that the firm's other digital-asset writing sets up but does not fully answer: how to convey access safely, without exposing it early and without losing it entirely.
Disclose the existence and location, never the keys
Begin with the disclosure that costs nothing to make. An executor who does not know a digital asset exists will not look for it, and a holding no one looks for is a holding that is lost as surely as if the key were destroyed. So the estate plan should record that the person holds digital assets, in general terms — that there is a hardware wallet, that there are accounts at named exchanges, that a seed phrase exists and is kept in a stated place. This is the existence and the location. It tells the executor what to administer and where the access instructions will be found. It does not, by itself, let anyone move a single coin.
The keys themselves are a different category and travel by a different route. A private key or a seed phrase is not a fact about the estate; it is the means of controlling the estate, and it must never be written into the will, an email, a shared note, or anything that can be read before the moment of use. The reason the will is disqualified is specific: once offered for probate it is a public record, and a secret in a public record is no longer a secret. The reason a casual share is disqualified is broader. Anyone who holds the key holds the asset, today, regardless of what the document says they are entitled to. Possession of the key is possession of the money.
Holding those two ideas apart is the whole discipline. The plan names the asset and points to where the keys live; the keys live somewhere the named person reaches only when their authority begins. A reader who wants the legal-authority side of this — what actually gives an executor the authority to compel a custodian or act on the estate's behalf in New York — will find it in the firm's article on fiduciary access to digital assets. This note assumes that authority exists and asks the next question: how the secret itself is conveyed without being exposed a day early.
The plan names the asset and points to where the keys live. The keys live somewhere the named person reaches only when their authority begins.
The instruments that carry the secret
The workhorse is a separate letter of instruction, kept outside the will. It is a private memorandum, not a testamentary document, and because it is private it can hold what the will cannot: where the hardware wallet sits, which custodians hold accounts, how the recovery words are stored, and the steps to take in order. It is referenced by the plan but does not become a public court record with it. The letter is updated as holdings change, which a will cannot easily be, and it is stored where the right person will reach it at the right time — with the attorney, in a safe-deposit box the fiduciary can open, or in sealed instructions held against the day they are needed.
The hardware wallet sharpens the same idea into a physical form. The device holds the keys; the recovery words restore them if the device is lost. Sealed written instructions explain to the executor where the device is, how the recovery words are kept, and what to do with them, while the words themselves stay sealed until the authority to use them exists. The point is timing. The executor learns the location and the procedure from the plan and the letter, but the operative secret stays closed until the person opening it is the person entitled to. A sealed envelope opened on the wrong day is the same failure as a key written into a public will.
A stronger arrangement removes the single point of failure altogether. In a multi-signature setup, more than one key is required to move the assets, and one of those keys can be held by a fiduciary — an attorney or a corporate trustee — so that no one person, including the holder, can act alone, and the loss or theft of any single key does not surrender the funds. That is a structuring decision rather than a disclosure tactic, and it is the subject of the firm's article on self-custodied crypto and the New York estate, which works through multi-signature succession in detail. For this note it is enough to see why it fits: it lets a key be conveyed to a fiduciary in advance without handing that fiduciary unilateral control.
Custodial accounts and true self-custody differ
The conveyance problem is not the same for every holding, and the dividing line is whether a provider exists. A custodial account — coins held at an exchange that controls the keys on the user's behalf — has an institution behind it. That institution can be presented with a death certificate and the documents that show a fiduciary's authority, and in New York a fiduciary's access to such an account is governed by the Revised Uniform Fiduciary Access to Digital Assets Act as adopted in EPTL Article 13-A. There is a party to compel and a process to follow. For these holdings the executor's task is largely to know the account exists and to establish authority the provider must honor; the statutory references are general here, and the specific path is a question for counsel.
True self-custody is a different world, and the difference is decisive. When a person holds their own keys, there is no provider standing between them and the assets, and so there is no provider for a fiduciary to compel. A death certificate persuades no one, because no one is in the position to be persuaded. The asset sits at an address that answers only to the key, and access dies with the keys. If the seed phrase is lost and was never conveyed, the value is stranded permanently — it still exists on the ledger and no one alive can move it. The firm's article on how cryptocurrency is lost at death sets out the full taxonomy of these failures; the relevant one here is the simplest, that a secret never conveyed is a secret gone.
That asymmetry is why the conveyance method has to match the holding. For custodial accounts, disclosure plus authority usually carries the day, because an institution can be made to act. For self-custodied assets, the disclosure has to be paired with a secure path for the key itself — a letter of instruction, sealed wallet instructions, or a multi-signature key in a fiduciary's hands — because no one can reconstruct a key that was never written down or shared. The general rule holds across both: separate the existence and location of the assets, which belongs in the plan, from the keys, which surface only when the authority to use them does. Where this lands for a particular estate depends on the facts and the law in force, and the plan should be drafted with counsel rather than assembled from logins.
A custodial account has a provider to compel. True self-custody does not — access dies with the keys.