CustodyStress
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Part of the CustodyStress archive of observed Bitcoin custody incidents

Institutional Failure

Cases where the custody failure originated at an institution — exchange, custodian, or platform — rather than with the individual holder. Includes insolvency, operational failure, and mismanagement.

Among the 72 cases in this category, 52% of determinate outcomes were blocked and 0% resulted in access restored. The most common recovery path is exchange support.

32
Blocked
30
Constrained
0
Survived
10
Indeterminate

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

72 observed cases
Blocked
32 (44%)
Constrained
30 (42%)
Indeterminate
10 (14%)
Vircurex Exchange Freezes Bitcoin Withdrawals, 1,666 BTC Remains Inaccessible
Exchange custody
Blocked 2014
Vircurex, founded in October 2011, operated as a custodial cryptocurrency exchange with servers in Beijing but registered falsely as a Belize entity—later deter
BitInstant Exchange Collapse: Charlie Shrem Arrest Freezes Customer Funds
Exchange custody
Blocked 2014
BitInstant operated as one of the earliest and most prominent custodial Bitcoin exchanges in the United States, co-founded by Charlie Shrem with backing from th
Picostocks Bitcoin Exchange: 7,196 BTC Lost to Insider Theft (2013–2014)
Exchange custody
Blocked 2014
Picostocks was a custodial Bitcoin exchange that allowed users to hold Bitcoin-denominated shares in various projects. The platform suffered two major theft inc
FXBTC Shanghai Exchange Premature Closure Blocks Customer Withdrawals
Exchange custody
Blocked 2014
FXBTC was a Shanghai-based cryptocurrency exchange operating during China's early Bitcoin trading boom. In early May 2014, following escalating regulatory press
Mt. Gox Withdrawal Crisis: levino's 347-Page Thread Documents SEPA Delays (April 2013)
Exchange custody
Constrained 2013
On April 18, 2013, BitcoinTalk user levino initiated a withdrawal of Euro proceeds from Mt. Gox, the world's largest Bitcoin exchange at that time. After 14 day
Bitfloor Exchange Closure March 2013: Banking Relationship Failure After Prior Hack
Exchange custody
Constrained 2013
Bitfloor, a US-based Bitcoin exchange, announced permanent closure on March 17, 2013, after its banking partner terminated the exchange's account without explan
Cryptsy Exchange Collapse: Concealed Hack Left Users Holding Worthless Balances
Exchange custody
Blocked 2013
Cryptsy emerged as the dominant altcoin exchange during the 2013 cryptocurrency boom, facilitating trading in Litecoin, Dogecoin, Feathercoin, and hundreds of a
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
DHS Seizure of Mt. Gox Dwolla and Wells Fargo Accounts (May 2013)
Exchange custody
Blocked 2013
On May 15, 2013, the US Department of Homeland Security, acting through Immigration and Customs Enforcement, seized approximately $2.9 million from Mt. Gox's Dw
Instawallet Hosted Wallet Shutdown After 2013 Security Breach: Partial User Reimbursement
Exchange custody
Constrained 2013
Instawallet, operated by French company Paymain (later Paymium), provided frictionless Bitcoin access during the early ecosystem's rapid expansion. The service
Mt. Gox SEPA Withdrawal Vanishes: mably's €EUR Transfer Confirmed But Never Received
Exchange custody
Indeterminate 2013
On April 6, 2013, BitcoinTalk user mably received email confirmation from Mt. Gox that a SEPA EUR withdrawal had been initiated. Twenty days elapsed without the
Mt. Gox SEPA Withdrawal Delayed 28 Days: lukcoin's Unresolved Case (May 2013)
Exchange custody
Indeterminate 2013
On May 7, 2013, BitcoinTalk user lukcoin posted in the Mt. Gox withdrawal delays thread describing a SEPA transfer initiated on April 9 that had not arrived aft
Institutional lockout — Mt. Gox (2013)
Exchange custody
Indeterminate 2013
On April 8, 2013, BitcoinTalk Legendary-ranked user el_rlee submitted a withdrawal request to Mt. Gox. Twelve days later, on April 20, el_rlee posted in a gathe
Mt. Gox Bitcoin Withdrawal Crisis: Weeks-Long Delays Signal Terminal Operational Failure
Exchange custody
Blocked 2013
By November 2013, Mt. Gox customers attempting to withdraw Bitcoin faced indefinite waiting periods, a critical escalation from earlier fiat-only delays. What h
Blockchain.info Web Wallet: Imported Private Key Vanished After Sync Popup
Exchange custody
Blocked 2013
In February 2013, a BitcoinTalk user (BurtW) generated a vanity address using vanitygen and imported the private key into his Blockchain.info web wallet account
CryptoXChange Exchange Collapse: Users Locked Out of Bitcoin Deposits
Exchange custody
Blocked 2012
CryptoXChange launched on November 10, 2011, as an Australian Bitcoin exchange offering two-factor authentication features including Yubikey support. The platfo
BTCex Unexpected Maintenance Closure and Permanent Platform Shutdown (July 2012)
Exchange custody
Blocked 2012
BTCex operated as a custodial Bitcoin exchange during the early market period. In May 2011, the platform suffered a critical security breach resulting in the lo
BitMarket.eu: Operator Speculation and Bitcoinica Collapse Froze 18,787 BTC in Customer Funds
Exchange custody
Blocked 2012
BitMarket.eu launched in April 2011 as a Polish peer-to-peer Bitcoin exchange. The platform operator, Maciej Trębacz, made a critical decision to invest custome
BitFloor Exchange Collapse: 24,000 BTC Theft, Minimal Restitution, Platform Shutdown
Exchange custody
Blocked 2012
BitFloor, a Bitcoin exchange operating in 2012, suffered a catastrophic custody failure on September 4, 2012. An attacker gained access to an unencrypted backup
Tradehill Exchange Shutdown: Users Locked Out After Dwolla Payment Reversal
Exchange custody
Constrained 2012
Tradehill operated as one of Bitcoin's earliest and most prominent exchanges, second only to Mt. Gox in trading volume and user trust. On February 13, 2012, the
Bitomat.pl Exchange Loses 17,000 BTC to AWS Instance Restart
Exchange custody
Constrained 2011
Bitomat.pl operated as the third-largest Bitcoin exchange globally and the largest in Poland during the early 2011 cryptocurrency market. On July 26, 2011, the
BTCex Exchange Users Discover 83% Bitcoin Missing After Temporary Closure
Exchange custody
Blocked 2011
BTCex was a Russian-based cryptocurrency exchange founded in September 2010 that facilitated trades between bitcoin and fiat currencies including Russian Rubles
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Trigger categories
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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