Archive › Structural patterns › Recovery Attempted, Access Still Blocked
Part of the CustodyStress archive of observed Bitcoin custody incidents
Recovery Attempted, Access Still Blocked
Cases where recovery was actively attempted — through technical means, legal proceedings, exchange support, or professional services — and access remained permanently blocked. These cases document the gap between recovery effort and recovery success.
Recovery-attempted-blocked cases are the most structurally instructive in the archive. They demonstrate that effort, resources, and professional assistance do not guarantee access when the underlying custody structure has failed. Password bruteforce is the most frequently attempted recovery path in this category, reflecting the high proportion of passphrase-related failures where the seed phrase exists but the passphrase does not. Exchange support is the second most common path, with a blocked outcome reflecting institutional failures where no operational recovery mechanism survived the platform's collapse.
199 cases match this pattern in the archive. Among cases with a determinate outcome, 100% resulted in permanently blocked access. 44% of cases in this pattern involved exchange custody. These cases document the gap between recovery effort and recovery success — situations where holders or heirs actively pursued access and still lost it.
100% of determinate cases resulted in blocked or constrained access.
199 observed cases
1,000+ BTC Permanently Lost: Multiple Hard Drive Formats Destroyed Wallet Data
Software wallet
Blocked
2016
In 2009, a teenager claiming to be an early Bitcoin adopter received over 1,000 BTC allegedly directly from Satoshi Nakamoto. The user stored the wallet on a de
Gatecoin Exchange: 250 BTC and 185,000 ETH Drained via Cold Storage Routing Compromise
Exchange custody
Blocked
2016
Gatecoin Limited operated as a Hong Kong-based cryptocurrency exchange from 2013, gaining credibility through backing by the Hong Kong Science and Technology Pa
Andreas1324 Permanently Locked Out of Electrum Wallet: Forgotten Password, No Seed Backup (May 2016)
Software wallet
Blocked
2016
In May 2016, a BitcoinTalk user posting as Andreas1324 opened a public thread in the Electrum wallet subforum describing complete loss of access to a wallet hol
796 Exchange — 1,000 BTC Stolen via Withdrawal Address Redirect (January 2015)
Exchange custody
Blocked
2015
796 was a Chinese cryptocurrency exchange offering spot and futures trading. In late January 2015, the platform discovered a security breach in which an attacke
Blockchain.info Legacy Wallet: Mnemonic Present, Backup File Present—Funds Inaccessible
Exchange custody
Blocked
2015
In 2015, the user created a Blockchain.info wallet and purchased Bitcoin, then implemented two backup strategies: a 17-word legacy mnemonic phrase and an encryp
Vircurex Withdrawal Freeze: Timothy Shaw's 12.85 BTC Locked Since 2014
Exchange custody
Blocked
2015
Timothy Shaw, a Colorado resident, executed a trade on Vircurex on March 24, 2014, converting his entire dogecoin balance into 12.85 BTC. That same morning, Vir
Zombie Paintball Incident: Written Password Loss Blocks Access to $20K Bitcoin
Software wallet
Blocked
2015
Luke purchased his first Bitcoin around 2013 for approximately $200 and continued accumulating holdings over roughly two years, investing between $15,000 and $2
MintPal/Moolah Exchange Collapse: 3,700 BTC Inaccessible After Ryan Kennedy's Exit Scam
Exchange custody
Blocked
2015
MintPal was a prominent altcoin exchange serving tens of thousands of users in 2014. Following a July 2014 hack that cost approximately $2 million in VeriCoin,
Cryptsy Inactive Account Bitcoin Disappearance (2015)
Exchange custody
Blocked
2015
In 2015, a Bitcoin holder registered on Cryptsy after acquiring Dogecoin, which they subsequently traded for Bitcoin. The account remained dormant for over a ye
Forgotten Blockchain.info Password: Client-Side Encryption Locks €100 Bitcoin Permanently
Exchange custody
Blocked
2015
On September 17, 2015, a Blockchain.info user with the forum username Seporstia posted requesting help recovering access to a hosted wallet after forgetting the
Cryptsy Freezes 175 BTC: Ukrainian User Blocked by KYC During Armed Conflict
Exchange custody
Blocked
2015
In 2015, a Reddit user known as alkinsonf held 175 Bitcoin on the popular exchange Cryptsy following an active trading period with no apparent issues. Without w
BTER Cold Wallet Compromise: 7,170 BTC Stolen, Exchange Suspended (February 2015)
Exchange custody
Blocked
2015
BTER, a Chinese cryptocurrency exchange, suffered a critical custody failure in February 2015 when its cold wallet—the repository for user Bitcoin deposits and
Blockchain.info iOS Wallet: $3,600 Lost to Missing Mnemonic and Unresettable Password
Exchange custody
Blocked
2015
In September 2015, TheLoser created a Bitcoin wallet on Blockchain.info using an iOS mobile device. Unlike documented Blockchain.info workflows, the wallet crea
Cryptsy November 2015: Three Frozen Withdrawals, Unresponsive Support, Hidden Insolvency
Exchange custody
Blocked
2015
In November 2015, a Cryptsy user publicly identified as Bitcointard filed detailed complaints across The Merkle, Reddit, and Bitcointalk forums describing three
Ruairi's Lost Paper Backup: €80 Bitcoin, Both Credentials on One Document
Software wallet
Blocked
2015
Ruairi purchased approximately €80 worth of Bitcoin in late 2015, driven by curiosity about the emerging technology and its associations with dark web markets.
Mt. Gox Exchange Collapse: 750,000 Bitcoin Trapped After February 2014 Withdrawal Halt
Exchange custody
Blocked
2014
Mt. Gox, the world's largest Bitcoin exchange at the time, announced a complete halt to all Bitcoin withdrawals on February 7, 2014. The exchange attributed the
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
Vircurex Exchange Freezes Customer Bitcoin Indefinitely After 2013 Hacks
Exchange custody
Blocked
2014
Vircurex, an altcoin exchange operating during the early cryptocurrency era, halted all withdrawals in March 2014 after suffering two significant security breac
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
Mt. Gox Collapse Overshadows Father's Estate: Unrecoverable Bitcoin Loss
Exchange custody
Blocked
2014
Around 2012, a Reddit user posted in a Mt. Gox horror story thread describing a custody failure layered with family loss. His father had died approximately one
Flexcoin Collapse: 896 BTC Hot Wallet Theft Leaves Users Permanently Locked Out
Exchange custody
Blocked
2014
Flexcoin, an Alberta-based service marketed as the first Bitcoin bank, operated a custodial platform for users seeking institutional-grade storage and transfer
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
MintPal Exchange Bankruptcy and 3,894 BTC Theft by Ryan Kennedy
Exchange custody
Blocked
2014
MintPal was an altcoin exchange that suffered a hack of 8 million Vericoin in July 2014. The exchange was subsequently acquired by Ryan Kennedy, who operated un
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
Other structural patterns
Outcome terms
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.
Assessment terms
Survivability
The degree to which a custody system maintains the possibility of authorized recovery under stress.
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?
Inclusion requirements
A case must satisfy all three of the following to be included:
- 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.
- 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.
- 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.
In scope
- 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
Out of scope
- 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
Source and verification
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.