States that hold unclaimed crypto generally require the same core documents as any unclaimed-property claim: a government-issued photo ID, proof you match the name and address on the original account, and any paperwork showing how you came to own that asset. Unclaimed property is money or assets a company turned over to a state treasury after losing contact with the owner, and crypto now falls into that category in a growing number of states. The exact paperwork depends on where the asset escheated — went to the state — and on how you came to own it. A claimant recovering their own dormant exchange account needs less than an heir claiming a deceased relative's holdings, and someone who held crypto in a self-custodied wallet faces a different proof problem entirely, since no state record ever listed them as the owner.
Table of Contents
- What identity documents do most states ask for?
- What if the original owner has died?
- Why are states now escheating crypto at all?
- What happened with Coinbase and Wyoming, and what does it mean for a claim?
- How do you prove ownership of a self-custodied wallet?
- Does ownership work differently when an exchange goes bankrupt?
- Frequently Asked Questions
What identity documents do most states ask for?
Every state unclaimed-property office starts with identity verification before it will release funds, crypto proceeds included. Arizona's Department of Revenue claim form accepts either a notarized signature or a legible photocopy of a valid driver's license, state or military ID, or passport, and that identity check applies to liquidated crypto proceeds the same as cash or stock Arizona's unclaimed-property claim form. Wisconsin's Department of Revenue lists a broader baseline package: proof of Social Security number, a government-issued photo ID, and proof of current address Wisconsin's Department of Revenue. Maryland takes a different first step.
The Comptroller's office tries to match the claimant's address or Social Security number against the record the original holder reported, and only asks for additional documents when that match fails Maryland Comptroller's claim form. That means a claimant whose current address matches state records may need almost nothing beyond basic ID, while someone who has moved, changed their name, or lacks a Social Security number on file should expect to supply more. The practical takeaway: pull your state's specific claim form before assuming a driver's license alone is enough. Requirements that look similar on the surface — identity verification — can mean a one-page notarized signature in one state and a multi-document package in another.
What if the original owner has died?
Claiming unclaimed property, including crypto, on behalf of a deceased owner adds a legal-authority requirement on top of identity verification. Texas Comptroller instructions specify that an heir must supply a death certificate plus a probated will or other heirship documents establishing the legal right to the asset before a claim can proceed Texas Comptroller's unclaimed-property instructions.
This matters more for crypto than for a forgotten bank account, because many crypto holders never told family members which exchange or wallet held their assets. If you're settling an estate, check unclaimed-property databases for the deceased's name as a routine step, and gather probate documents early — the state needs proof of legal standing, not just proof of the asset's existence.
Why are states now escheating crypto at all?
Until recently, most state unclaimed-property laws only covered traditional financial accounts. That's changing. California's SB 822, signed October 11, 2025, and effective January 1, 2026, adds digital financial assets to the state's Unclaimed Property Law, requiring holders — typically exchanges — to escheat crypto after three years of account dormancy. Owners then file a claim with the State Controller to recover the asset or its cash value Orrick's summary of SB 822.
Virginia took a different approach in its 2026 law: rather than liquidating dormant crypto to cash before transfer, as most states' escheat laws require, the state requires custodians to transfer the actual tokens in-kind after five years of dormancy The Block's report on Virginia's law. That distinction matters for a claim: if your state received cash proceeds from a forced sale, you recover a dollar amount fixed at the sale date, not the coin's current value. If your state received the asset in-kind, you may recover the actual tokens. Check which model your state follows before assuming a claim will return crypto rather than cash. The claim form itself usually won't say — you may need to check the underlying statute or ask the treasury office directly.
What happened with Coinbase and Wyoming, and what does it mean for a claim?
The clearest real-world example of crypto escheatment at scale is Wyoming's. In 2024, the state's treasury received roughly $270 million after Coinbase closed about a quarter-million dormant customer accounts, many tied to a Kenyan subsidiary, and liquidated the crypto under unclaimed-property law WyoFile's reporting on the Coinbase transfer.
Former account holders must file a claim with Wyoming's treasury, not with Coinbase, to recover the proceeds. Wyoming's State Treasurer's Office tells former Coinbase account holders that a claim status reading "Waiting on Claimant" means the state still needs additional identity or ownership documents before it can process payment, and that review can take several months Wyoming State Treasurer's FAQ. If you're in that queue, the fastest way through it is usually providing exactly the documentation the state's claim form lists up front — old account statements, transaction history, or exchange correspondence showing the account was yours — rather than waiting for a follow-up request to arrive.
How do you prove ownership of a self-custodied wallet?
Crypto held in a personal wallet, rather than on an exchange, never generates a state unclaimed-property record, because no company reported it as dormant. Proving ownership there is a technical problem, not a paperwork one.
The standard method is a cryptographic signature: using the wallet's private key to sign a specific message, which anyone can then verify against the wallet's public address without exposing the private key or moving any funds BitRef's signed-message verification tool. This method doesn't work on every wallet type — it fails on multisig or script-based addresses, which require multiple keys or more complex verification. If you're trying to establish ownership of a self-custodied wallet for a legal or estate purpose, confirm the wallet type first, since a standard signature won't satisfy the proof requirement on a multisig setup.
Does ownership work differently when an exchange goes bankrupt?
Crypto held on an exchange that enters bankruptcy, rather than one that simply closes a dormant account, raises a separate ownership question. In the FTX bankruptcy, counsel advised that customers whose crypto is legally deemed to be their own property may recover it ahead of general creditors, while crypto deemed to be FTX's own property leaves customers as unsecured creditors paid pro rata alongside everyone else the company owed money Varnum LLP's analysis of FTX customer notices.
Disputed cases were advised to file a proof of claim with a reservation of rights, preserving the argument that the assets were always the customer's rather than the estate's. That legal distinction — whose property was it — matters more in a bankruptcy than in a standard dormancy escheatment, where ownership is rarely contested. If you're navigating a bankrupt exchange rather than a state treasury, the relevant documents are the account statements and terms of service that establish how the exchange itself classified your holdings, not the identity paperwork a state claim form asks for.
Frequently Asked Questions
Does a state ever ask for the crypto's transaction history?
Some claim reviews, like Wyoming's "Waiting on Claimant" status for former Coinbase holders, request additional ownership documentation beyond standard ID, which can include account or transaction records Wyoming State Treasurer's FAQ.
Will a state return the actual cryptocurrency or its cash value?
It depends on the state's law. Virginia's 2026 statute requires in-kind transfer of the tokens themselves after five years of dormancy, while most states' escheat laws liquidate crypto to cash before transfer The Block's report on Virginia's law.
Can I prove ownership of a wallet without involving a state agency?
Yes, for self-custodied wallets. A cryptographic signature made with the wallet's private key proves control of the address without a state record or third-party verification, though it doesn't work on multisig wallets BitRef's signed-message verification tool.