Can an Agent Under a Power of Attorney Access Crypto Without Your Keys?
A power of attorney is designed to let a trusted agent step in and manage someone’s financial affairs when they can’t do it themselves. With most accounts, that authority is enough. With crypto, legal authority and practical access turn out to be two very different things.
The short answer
A power of attorney grants legal authority to act on someone’s behalf, but it does not, by itself, hand over the private keys or credentials needed to actually access a cryptocurrency wallet. An agent can be fully authorized under the law and still be completely unable to do anything with the crypto, simply because no institution or intermediary holds the keys and can honor the document the way a bank would.
Why crypto breaks the usual power of attorney workflow
With a traditional bank or brokerage account, a power of attorney works because there’s an institution in the middle. The agent presents the document, the institution verifies it, and it grants access or authority over the account on the principal’s behalf. That workflow depends entirely on having an intermediary who can recognize legal paperwork and act on it. A self-custody crypto wallet has no such intermediary — access is controlled directly by whoever holds the private keys or seed phrase, and there’s no customer service line to call or legal department to review documents. The document can be perfectly valid and still be functionally useless if the agent doesn’t separately know where the keys are.
What actually determines whether access works
- Whether the principal shared the keys or seed phrase in advance. A power of attorney gives permission; it doesn’t reveal a secret nobody told the agent. If the credentials were never communicated somewhere accessible, they may be permanently out of reach.
- Where the crypto is held. Assets held with a custodial platform that maintains customer accounts may be able to process a valid power of attorney the way a traditional financial institution would; a wallet in pure self-custody generally cannot.
- Whether the storage method anticipated this scenario. Some approaches, like multisig arrangements used by businesses for shared control, or a properly structured digital asset trust, are built with exactly this kind of access problem in mind. A plain single-key wallet generally is not.
- State and institutional recognition. Even where an agent does have the keys, how power of attorney documents are treated for digital assets varies by state, and rules in this area continue to evolve.
Why this overlaps with estate and incapacity planning
The same practical gap shows up when heirs try to gain access to crypto held in a self-custody wallet after someone dies — legal standing to inherit doesn’t automatically translate into technical ability to access funds that only the deceased could unlock. Power of attorney situations raise an earlier version of the identical problem: authority to act while someone is alive but incapacitated still runs into the same wall if the keys were never made accessible in the first place.
What to weigh
Anyone naming an agent under a power of attorney who also holds self-custody crypto has to solve an access problem that traditional estate planning tools don’t address on their own. Legal documents establish who is permitted to act; they don’t substitute for actually giving that person a way to reach the keys. Because rules around digital assets and fiduciary access continue to change and vary by circumstance, this is generally an area worth discussing with an attorney familiar with digital assets rather than assuming a standard power of attorney form will cover it.