A Self-Custodied Wallet Cannot Be Frozen, Only Moved

principle

Core idea

For a decentralised asset held in a wallet the target controls, there is no intermediary to serve, so freezing is not available as a measure. Anyone holding a copy of the private key can move the funds irrevocably, from anywhere, including while the target sits in custody. The only securing measure that actually secures anything is a transfer of the value to an address the authority controls. Until that transfer confirms, nothing has been seized.

Components

Copies, not possession, are what matter. A private key is a number. It can exist in unlimited copies, in different formats, in different places, held by different people. Obtaining one copy removes nobody else’s.
Seizing the container is not seizing the value. Both sources say this in almost identical words. Taking the computer, taking the hardware wallet, taking the paper wallet, or imaging the disk and copying the wallet.dat file leaves the value exactly where it was and still reachable by anyone else with the key or the seed phrase.
Confirmed transactions are irreversible. Once the target’s transfer confirms there is no recall, no chargeback, and no intermediary to reverse it. This is why the measure is a race rather than a filing.
Two exceptions, both of which restore an intermediary. Where one exists, serve it and freezing works normally:
- Centralised virtual assets, which answer to an administrator who issues the asset, sets the rules, and keeps the ledger. A court order to that administrator freezes or seizes.
- Custodial wallets and VASP-held balances, where the provider holds the key on the customer’s behalf. Serve the provider, exactly as you would a bank.
This is why the destination address has to exist before the search does. See Preparing and Executing a Crypto Seizure Transfer. There is no version of this where you seize first and work out the mechanics afterwards.

When to use

At the point a case moves from tracing to enforcement, and whenever anyone in the chain treats “we have his laptop” or “we have his ledger device” as the end of the asset-recovery problem.

Avoid when

Do not read this as authority to move funds. The transfer needs the legal instrument first, and the instrument has to name the destination address. Moving value without it is not a seizure, it is a transfer by a police officer.

Example

GAFILAT’s framing: as long as the cryptocurrency sits in the suspect’s wallet, even with the suspect in custody, any third party with the key can irrevocably transfer it. The corollary is that a freezing order served on nobody is an order that cannot be executed, and the file will show a securing measure that secured nothing.

Seizing Crypto: Devices, VASP Accounts, and the Agency Wallet · Preparing and Executing a Crypto Seizure Transfer · Freezable vs Non-Freezable Crypto Assets · Issuer Freeze Mechanisms: Blacklist, Wipe, and Protocol-Level Blocking · Five Steps to Obtain Control Over Crypto · Post-Seizure Custody and Disposal of Seized Crypto · Crypto Artifacts on a Seized Device · Identifying Cryptocurrency in the Field · Time-Decay of Crypto Evidence · Freeze Circumvention Techniques and Countermeasures