Drafting the Digital Asset Codicil: A Practitioner's Primer

Most succession lawyers in Australia have, at some point in the last 24 months, been asked the same question by a client: 'What happens to my Bitcoin if I die?' The honest answer, for most practitioners, is some version of 'I'm not sure - let me get back to you.'

The good news: you don't need to become a cryptographer to draft for digital assets. You need to understand three things - what the asset actually is, what your client controls, and who else has to be involved for the wishes you draft to be enforceable.

Bitcoin is a bearer asset. Whoever holds the private keys controls the coin, full stop. There is no central register, no ASIC equivalent, and no provider you can call to release funds on production of a grant of probate. If your client holds Bitcoin in self-custody and the keys are unrecoverable on death, the asset is gone - even though the will may purport to gift it.

This is why the codicil cannot live in isolation. Drafting language like 'I give my Bitcoin holdings to my spouse' is necessary but nowhere near sufficient. The clause needs to sit alongside a documented custody architecture: where the keys are, how they are split, who else holds backup material, and what conditions trigger the transfer.

A workable digital asset codicil typically addresses five things. First, identification - a description of the holdings sufficient for an executor to know what to look for, without compromising operational security. Second, custody description - a reference to the wallet structure and the parties who hold key material, usually by reference to a separate (and confidentially held) custody schedule. Third, authority - granting the executor the right to take whatever steps are required to recover the assets, including engaging technical specialists. Fourth, beneficiary mechanics - whether the assets are gifted in specie or liquidated, and on what timeline. Fifth, fallback - what happens if recovery fails, partial recovery occurs, or the asset has changed materially in value.

The risk to the practitioner is real but manageable. Drafting in this area without a custody partner is the equivalent of drafting a property clause without ever asking where the title deeds are kept. The clause may be elegant, but it cannot be performed.

Our recommendation to firms we work with is simple: build a relationship with a specialist custody partner, treat the custody architecture as part of the estate planning file, and don't accept instructions that reduce to 'just gift the Bitcoin to my spouse.' Your client deserves better, and your file deserves the protection.