CustodyStress
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.

199
Blocked
0
Constrained
0
Survived
0
Indeterminate

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

199 observed cases
Blocked
199 (100%)
Bitcoin Core Wallet Passphrase Rejected: $400 USD Inaccessible
Software wallet
Blocked 2018
In September 2018, a Bitcoin Core user reported being locked out of their encrypted software wallet containing approximately $400 USD in Bitcoin. The wallet had
Recovered 12-Word Seed Phrase but Balance Shows Zero: Imported Address Problem
Software wallet
Blocked 2018
In September 2018, a Bitcoin holder attempted to recover wallet access after forgetting which software they had originally used. They obtained a 12-word recover
Mt. Gox Account Access Permanently Blocked Following Owner Death and Credential Reset
Exchange custody
Blocked 2018
Mt. Gox ceased operations in February 2014 following the loss of approximately 850,000 Bitcoin. Users with dormant accounts on the platform faced an immediate c
MapleChange Exit Scam: 919 Bitcoin Lost, CEO Identified as Glad Poenaru
Exchange custody
Blocked 2018
MapleChange, a small Canadian cryptocurrency exchange, announced on October 28, 2018 that it had suffered a catastrophic hack. According to the exchange's Twitt
Elvis Cavalic and QuadrigaCX: C$15,000 Withdrawal Lost to Exchange Collapse
Exchange custody
Blocked 2018
Elvis Cavalic of Calgary, Alberta was an active QuadrigaCX customer who had accumulated cryptocurrency holdings through trading on the platform. In October 2018
Yapizon Exchange Hack (April 2017): 3,831 BTC Stolen, Socialised Loss Model Applied to All Users
Exchange custody
Blocked 2017
On April 22, 2017, Yapizon, a South Korean cryptocurrency exchange, suffered a security breach resulting in the theft of 3,831 BTC—approximately 37% of the exch
Dash Core Wallet Passphrase Forgotten: Permanent Access Loss
Software wallet
Blocked 2017
In April 2017, a BitcoinTalk forum user identified as 'Ramchandra' posted describing a custody failure involving a Dash Core software wallet. The user had encry
Blockchain.info Wallet Lockout: Documented Seed Phrase Fails Validation
Exchange custody
Blocked 2017
Sir11k created a Blockchain.info custodial wallet in June 2017 with approximately €20 worth of Bitcoin. Upon account creation, the platform provided a 12-word B
Blockchain.info Watch-Only Import Without Private Key Retention
Exchange custody
Blocked 2017
In June 2017, a Bitcoin Talk forum user (amirheavy666) discovered that approximately 0.00027375 BTC accumulated on a Blockchain.info wallet created around 2014
Bitcoin Lost After Hard Drive Format: wallet.dat Unrecovered, Private Key Missing
Software wallet
Blocked 2017
A Bitcoin holder received cryptocurrency in 2013 via Bitcoin Core but did not understand the critical role of the wallet.dat file in securing access to funds. I
Blockchain.info Legacy Wallet Access Failure: 17-Word Recovery Phrase Incompatibility
Exchange custody
Blocked 2017
Beginning in late November 2017, multiple users including Ople, nwankwotech, and Boldos reported simultaneous access failures to Blockchain.info wallets created
MultiBit Classic Password Rejection: Verified Credentials, Inaccessible Funds
Software wallet
Blocked 2017
In November 2017, a BitcoinTalk user reported a critical wallet access failure involving MultiBit Classic 0.5.15 on macOS. The user had created two encrypted wa
BTC-e Exchange Seized by U.S. DOJ: 1 Million Users Lose Access (July 2017)
Exchange custody
Blocked 2017
BTC-e, founded in 2011 and headquartered in Russia, operated as an unlicensed money transmitter for six years, processing over $9 billion in cryptocurrency tran
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
Jaxx Mobile Wallet — Permanent Loss After Android Factory Reset Without Seed Backup
Software wallet
Blocked 2017
In September 2017, a BitcoinTalk user (Mikekom) reported installing the Jaxx wallet application on an Android smartphone to hold Bitcoin earned by their 13-year
Homeland Security Bitcoin Seizure: Unencrypted Seed Phrase Discovered During Search
Software wallet
Blocked 2017
BurtW, a BitcoinTalk forum user, revealed in April 2017 that he had been arrested and that Homeland Security conducted searches of both his home and office. Dur
Blockchain.info Wallet: Lost Password and Recovery Phrase on Phone
Exchange custody
Blocked 2017
In June 2017, a Blockchain.info user posted on Bitcoin Stack Exchange reporting the loss of both their wallet password and 12-word recovery phrase after losing
Custodial Wallet Provider Bankruptcy: 2012 Bitcoin Purchase Permanently Inaccessible
Exchange custody
Blocked 2017
In November 2017, a Bitcoin holder disclosed that they had purchased Bitcoin in 2012 but subsequently lost access to their holdings after the company maintainin
Deceased Father's Bitcoin Inaccessible: No Keys, No Will, No Documentation
Unknown custody system
Blocked 2017
In 2017, a Reddit user posted to r/Bitcoin describing their father's death and the discovery that he had owned Bitcoin but left no will, private keys, seed phra
Uphold Freezes 165 BTC Business Account: Inconsistent Enforcement and Unresolved Access
Exchange custody
Blocked 2017
Oleg operated Nexchange.io, a cryptocurrency exchange that used Uphold as a liquidity provider. In 2017, he executed a single trade of 165 BTC (approximately $1
Bitcoin Core Wallet Lost When Computer Discarded Without Backup
Software wallet
Blocked 2017
In November 2017, a Bitcoin holder posted to Bitcoin Stack Exchange seeking recovery options after a critical custody failure. The user had purchased Bitcoin se
33.54 BTC Corrupted in Wallet.dat: Binary File Opened in Text Editor
Software wallet
Blocked 2017
In July 2016 or earlier, ketubi saved a wallet.dat file from Bitcoin Core to a USB drive, intending to create an offline backup. Years later, in December 2017,
Deceased Bitcoin Miner: Funds Locked on Coinbase, Lost on SnapCard Closure
Exchange custody
Blocked 2016
A Bitcoin miner died intestate in 2016, leaving behind mining equipment and active cryptocurrency accounts on Coinbase and SnapCard, a now-defunct wallet servic
Block.io Permanent Loss: Forgotten PIN and Missing Secret Mnemonic Backup
Exchange custody
Blocked 2016
In February 2016, a BitcoinTalk user identifying as CaRLoSXXX posted a distress message after losing access to their Block.io wallet. Block.io is a non-custodia
Cointrader Exchange Discovers Bitcoin Shortfall, Suspends Operations Indefinitely (March 2016)
Exchange custody
Blocked 2016
Cointrader operated as a Canadian cryptocurrency exchange with modest activity through early 2016, processing approximately 81 BTC in daily trading volume durin
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Structural patterns
Other structural patterns
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.