CustodyStress
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Part of the CustodyStress archive of observed Bitcoin custody incidents
Legal ProceedingsBlocked

Legal Proceedings — Blocked

Cases where legal proceedings failed to restore access. Court orders and legal entitlement could not overcome the technical barrier — or the institutional target of the proceedings did not survive to comply.

15 cases in this intersection. 100% of determinate cases resulted in a blocked outcome. The most common recovery path is legal proceedings.

Archive analysis — 15 cases
Outcomes
100% of determinate cases resulted in blocked access — 31 percentage points above the archive-wide average of 69%. Only 0% resulted in recovered access — one of the lower survival rates in the archive.
Custody type
67% of cases involved exchange custody, followed by software wallet at 13%.
Primary stress condition
53% of cases involve vendor lockout. Device loss accounts for a further 13%.
Recovery path
Legal Proceedings is the most documented recovery path (15 cases, 100% of subset). Of those with a determinate outcome, 0% resulted in recovered or constrained access.
Documentation
87% of cases had present and interpretable documentation — yet still produced a blocked or constrained outcome.
Scale
20% of cases involved large or very large holdings (10+ BTC).
15
Blocked
0
Constrained
0
Survived
0
Indeterminate

100% of determinate cases resulted in blocked or constrained access.

15 observed cases
Blocked
15 (100%)
Astamur Ardzibna Shot Dead in Abkhazia Over Cryptocurrency Mining Operation
Unknown custody system
Blocked 2021
Astamur Ardzibna was fatally shot in October 2021 during an armed dispute over cryptocurrency mining operations in Abkhazia, the de facto independent territory
QuadrigaCX Exchange Collapse (April 2019): Mass Custody Loss
Exchange custody
Blocked 2019
QuadrigaCX, founded in 2013 and one of Canada's largest cryptocurrency exchanges, ceased operations on April 15, 2019, with approximately 115,000 users unable t
QuadrigaCX Exchange Collapse: CEO Death Blocks Access to $190M in Customer Cryptocurrency
Exchange custody
Blocked 2019
QuadrigaCX, founded in 2013 and operating as one of Canada's largest cryptocurrency exchanges, ceased operations in January 2019 following the death of CEO and
BitGrail Exchange Collapse: 17 Million NANO Stolen, 230,000 Users Frozen
Exchange custody
Blocked 2018
BitGrail, an Italian cryptocurrency exchange, announced on February 8, 2018 that approximately 17 million NANO tokens—valued at roughly $170 million at the time
Xitong Zou: QuadrigaCX Creditor During Exchange Collapse and Fraud
Exchange custody
Blocked 2018
Xitong Zou was a customer of QuadrigaCX, a Canadian cryptocurrency exchange that collapsed in late 2018. Like thousands of other users, Zou had cryptocurrency h
Kleiman Estate v. Craig Wright: Bitcoin Access Blocked by Knowledge Concentration
Unknown custody system
Blocked 2018
David Kleiman, a computer forensics expert in Palm Beach County, Florida, died in April 2013. His brother Ira Kleiman later alleged that David and Craig Steven
WEX.nz US Citizen Lockout: Recovered Funds Inaccessible Due to Geographic Verification Bar
Exchange custody
Blocked 2017
Following the July 2017 FBI seizure of BTC-e exchange assets, the platform's successor WEX.nz announced recovery of 55% of client Bitcoin holdings, with plans t
MtGox Withdrawal Halt and Bankruptcy: 400K Inheritance Permanently Blocked
Exchange custody
Blocked 2014
In 2014, the largest Bitcoin exchange at that time, MtGox, ceased Bitcoin withdrawals and subsequently filed for bankruptcy protection. A documented case emerge
Mt. Gox Exchange Collapse: Operator Theft and 650,000 Lost Customer Bitcoin
Exchange custody
Blocked 2014
Mt. Gox operated as the dominant Bitcoin-to-fiat exchange from 2010 to 2014, handling approximately 70% of global Bitcoin trading volume at its peak. The platfo
CoinLab vs. Mt. Gox: Partnership Collapse Traps North American Customer Bitcoin in Legal Limbo (May 2013)
Exchange custody
Blocked 2013
In 2012, Mt. Gox and CoinLab signed a partnership agreement under which CoinLab would assume management of Mt. Gox's US and Canadian customer operations, includ
James Howells and the Landfill Bitcoin: Device Lost, Recovery Legally Blocked
Software wallet
Blocked 2013
James Howells, a UK resident, discarded a hard drive containing an encrypted Bitcoin wallet during a routine office clearance in 2013. The device was disposed o
Dave Kleiman Estate vs. Craig Wright: 1.1 Million Bitcoin, Ownership Unresolved
Unknown custody system
Blocked 2013
Dave Kleiman, a computer forensics specialist based in Florida, was an early Bitcoin developer who died on April 26, 2013, after years of declining health follo
Intersango Exchange Collapse: 2000 BTC User Funds Retained by Operator — Norman v. Strateman
Exchange custody
Blocked 2012
Intersango, a UK-based Bitcoin exchange co-founded by Amir Taaki and Patrick Strateman, ceased operations in 2012 after losing its banking relationship. At the
James Howells' 7,500 Bitcoin: Hard Drive Lost in Newport Landfill
Software wallet
Blocked
James Howells, a software engineer in Newport, South Wales, accidentally discarded a hard drive containing approximately 7,500 to 8,000 Bitcoin in the early 201
MtGox Exchange Collapse: 850,000 Bitcoin Custody Failure
Exchange custody
Blocked
Mt. Gox, founded in 2006 and operating as a Bitcoin exchange from 2010, accumulated custody of approximately 850,000 Bitcoin belonging to its users by early 201
Browse by recovery path and outcome
Terms guide
Survived
Access remained possible under the reported conditions.
Constrained
Access remained possible, but only with delay, dependence, or significant difficulty.
Blocked
Access was not possible under the reported conditions.
Indeterminate
There was not enough information to determine the outcome.
Survivability
The degree to which a custody system maintains the possibility of authorized recovery under stress.
Archive inclusion criteria

This archive documents cases where a legitimate owner, heir, or authorized party encountered barriers accessing or recovering Bitcoin due to a failure in the custody arrangement. The central question for inclusion is: did the custody structure fail a legitimate access or recovery attempt?

A case must satisfy all three of the following to be included:

  1. Legitimate access attempt. The person attempting to access or recover the Bitcoin was the owner, a designated heir, an executor, a legal authority, or another party with a legitimate claim — not a thief, attacker, or unauthorized third party.
  2. Custody structure failure. The failure was caused by a property of the custody arrangement — missing credentials, structural dependencies, documentation gaps, knowledge concentration, legal barriers, or institutional constraints — not market conditions, individual-level fraud or theft, or protocol-level issues. Platform-level failures that block legitimate user access are in scope regardless of their cause.
  3. Documentable outcome or access constraint. The case must have a stated or inferable outcome: access blocked, access constrained, access delayed, or access eventually achieved through a recovery path. Cases with entirely unknown outcomes are included only where the structural failure is documented and the constraint is unambiguous.
  • Owner death or incapacity — Bitcoin held in self-custody that becomes inaccessible to heirs or designated parties because credentials, documentation, or operational knowledge were not transferred
  • Passphrase loss — BIP39 passphrase forgotten or unavailable, blocking access to a funded wallet even where the seed phrase is present
  • Seed phrase or wallet backup unavailable — no independent recovery path existed or the backup was destroyed, lost, or never created
  • Device loss without independent backup — hardware wallet, phone, or computer lost or destroyed with no recovery path outside the device
  • Documentation absent or ambiguous — heirs or executors cannot determine that Bitcoin exists, which wallet holds it, or how to access it
  • Knowledge concentration — only one person knew the procedure, passphrase, or access method; that person is dead, incapacitated, or unreachable
  • Multisig quorum failure — a threshold signature arrangement cannot be completed because signers are unavailable, uncooperative, incapacitated, or have lost their keys
  • Legal authority / access mismatch — a court order, probate ruling, or power of attorney establishes legal entitlement but provides no technical path to access
  • Institutional custody barrier — exchange or platform hacks, insolvency, regulatory seizure, or operational failure that caused a access constraint or failure for legitimate users, whether temporary, prolonged, or permanent. The failure of the custodian to remain available or solvent is itself the in-scope event.
  • Forced relocation or geographic constraint — physical access to a device or location required for recovery is blocked by displacement, border restrictions, or political circumstances
  • Coercion — the holder was compelled under threat to transfer Bitcoin or disclose credentials during an access event
  • Hidden asset discovery — heirs or executors locate a wallet or account but cannot access it due to missing credentials or operational knowledge
  • Market losses, investment losses, yield scheme losses, or Ponzi scheme losses
  • Hacks or theft targeting an individual's personal security (phishing, SIM swap, social engineering, malware) where the custody architecture itself did not fail
  • Unauthorized transfers where the holder's custody system was not the cause of the failure
  • Ordinary transaction mistakes — wrong-address sends, fee errors, mistaken amounts
  • Protocol-level failures — cryptographic vulnerabilities, consensus bugs, firmware integrity failures
  • Deliberate burns or tribute burns
  • Cases where the stated loss is unverifiable and no structural custody failure is described

Cases are drawn from public sources including forum posts, news reporting, court documents, academic research, and direct submissions. Each case is reviewed against the inclusion criteria above before publication. Source material is retained and available on request for documented cases.

The archive is observational and descriptive. It does not attempt to document all Bitcoin custody failures — only those meeting the criteria above with sufficient documentation to describe the structural failure and its outcome.

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