CustodyStress
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Part of the CustodyStress archive of observed Bitcoin custody incidents
Device_discardedDevice loss

Device Discarded — Device loss

Cases where a discarded device triggered device-loss access failure. Hardware disposed of without extracting wallet keys — the most common irreversible device-loss pattern.

44 cases in this intersection. 80% of determinate cases resulted in a blocked outcome and 20% in access survived. The most common recovery path is no path available.

Archive analysis — 44 cases
Outcomes
80% of determinate cases resulted in blocked access — 11 percentage points above the archive-wide average of 69%.
Documentation coverage
55% of cases have indeterminate outcomes — higher than the archive average of 43%.
Custody type
93% of cases involved software wallet, followed by hardware wallet (single key) at 5%.
Documentation
75% of cases had partial documentation — insufficient to complete recovery without the holder's direct involvement.
Scale
25% of cases involved large or very large holdings (10+ BTC).
Time distribution
Cases span 2009–2024. Only 9% occurred in 2022 or later — concentrated in earlier periods.
16
Blocked
0
Constrained
4
Survived
24
Indeterminate

80% of determinate cases resulted in blocked or constrained access.

44 observed cases
Blocked
16 (36%)
Survived
4 (9%)
Indeterminate
24 (55%)
100 Bitcoin Lost on Unbackedup USB Flash Drive: Early Adopter Custody Failure
Software wallet
Blocked 2024
A BitcoinTalk forum user known as 'oktana' disclosed in March 2024 the loss of 100 bitcoins stored on a USB flash drive. The coins were acquired during Bitcoin'
Recovering Lost Armory Wallet from Overwritten 2009-2010 Laptop Disk
Software wallet
Indeterminate 2023
In June 2023, a Bitcoin holder initiated a public recovery effort for an Armory wallet created in 2009–2010 on a personal laptop. The original device remained i
Corrupted wallet.dat Data Recovery Attempt: Multi-Tool Failure After Hard Drive Format
Software wallet
Indeterminate 2022
In November 2022, a Bitcoin holder discovered that a hard drive containing a wallet.dat file from approximately 2012–2014 had been formatted years earlier. Reco
Unencrypted 2010 Wallet.dat Corrupted Beyond Recovery
Software wallet
Indeterminate 2022
In March 2022, RBIT777 posted to a Bitcoin forum seeking help recovering a wallet created in 2010 on their hard drive. The wallet had never been encrypted—a com
2011 Bitcoin Wallet on Heavily Reused Hard Drive: Data Fragmentation and Loss
Software wallet
Indeterminate 2021
In June 2021, a BitcoinTalk forum user (ice-gram) reported discovering an old hard drive containing a wallet.dat file with Bitcoin purchased in 2011. The drive
29 BTC Lost in Corrupted MultiBit Classic Wallet After Hard Drive Format
Software wallet
Blocked 2020
In 2014, JAMBO2014 acquired Bitcoin and stored it in MultiBit Classic 0.5.17, a desktop software wallet, without separately recording or backing up the private
Encrypted Wallet.dat Recovery After Quick Format: Hex Extraction Versus File Recovery
Software wallet
Indeterminate 2020
In November 2020, a user ('fajja') on BitcoinTalk discovered old hard disks that had been quick-formatted years earlier, containing Bitcoin Core wallet.dat file
Corrupted 2011 Bitcoin Mining Wallet: File Recovery Attempted but Balance Unverifiable
Software wallet
Blocked 2018
In September 2018, a Bitcoin forum user discovered an old wallet.dat file originating from 2011 Bitcoin mining activity on his original hard drive. After a frie
Electrum Wallet Lost to Laptop Hardware Failure: No Seed Phrase Backup
Software wallet
Indeterminate 2018
On October 12, 2018, a BitcoinTalk forum user identified as Chabole007 reported losing access to an Electrum software wallet after their laptop experienced hard
Mobile Wallet Loss: Phone Format Destroys All Recovery Credentials
Exchange custody
Indeterminate 2018
On April 22, 2018, BitcoinTalk forum user Calypso_Dame reported a critical custody access failure resulting from a mobile phone format operation. The user had r
Wallet.dat Corruption After Accidental Drive Format — Recovery via Data Recovery and Pywallet
Software wallet
Survived 2017
In July 2017, AleksTo, a newcomer to Bitcoin, accidentally formatted their hard drive, destroying the only local copy of their wallet.dat file. The user immedia
32 BTC Lost to Windows Reinstall: Wallet.dat Overwritten, Recovery Uncertain
Software wallet
Indeterminate 2017
In June 2017, forum user morbius55 discovered that approximately 32 BTC—valued at roughly $84,000 USD at the time—had become inaccessible after reinstalling Win
Corrupted Bitcoin QT wallet.dat: Undelete and Hex Editor Recovery Attempt
Software wallet
Indeterminate 2017
In March 2017, a Bitcoin user identified as Sammo619 described a custody failure involving a Bitcoin QT Core wallet created in 2014. All backups of the wallet.d
20+ Bitcoin Lost to Double Hard Drive Format; Renamed Wallet File Unrecoverable
Software wallet
Indeterminate 2017
Speed1987 (David) acquired at least 20 BTC in 2010 and stored the wallet file on his personal computer's hard drive. To obscure the wallet from potential attack
Lost Bitcoin on Offline IDE Drive: 2010 Purchase, 7-Year Gap, Unknown Recovery
Software wallet
Indeterminate 2017
Sara Smit posted to a Bitcoin forum on December 17, 2017, describing a custody failure spanning approximately seven years. She reported purchasing Bitcoin in 20
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
Smartphone Wallet Reset Without Backup: 15 BTC Private Key Unverified
Software wallet
Indeterminate 2016
In November 2016, a user identified as 'Farer' created a Bitcoin wallet on a smartphone and accumulated 15 bitcoins. Approximately one year later, the user rese
Hard Drive Format Recovery: 2 BTC Restored via Sector Scanning and wallet.dat Reconstruction
Software wallet
Survived 2015
In approximately 2015, marilyn4325 formatted a hard drive and installed Windows 10, intending to preserve wallet data via backup first. However, the backup beca
James Howell's Hard Drive: 8,000 Bitcoin Lost in Welsh Landfill
Hardware wallet (single key)
Blocked 2014
James Howell, a British-based individual, accidentally discarded a hard drive containing private keys to approximately 8,000 Bitcoin while cleaning his office a
Encrypted Wallet Recovery After Accidental Partition Deletion (2013)
Software wallet
Indeterminate 2013
On July 17, 2013, a Bitcoin holder identified as Praxis posted to a cryptocurrency forum after losing access to multiple wallet files stored in hidden Linux dir
James Howell's 8,000 Bitcoin Hard Drive: Landfill Loss Without Backup
Software wallet
Blocked 2013
James Howell, a computer professional based in Wales, accumulated approximately 8,000 Bitcoin during the early mining era through a combination of mining and ac
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
Australian Miner Loses Early Bitcoin When Sole USB Backup Drive Fails Irrecoverably
Software wallet
Blocked 2013
Alex, an Australian Bitcoin miner based in Melbourne, mined Bitcoin around 2010 when mining was still a hobbyist activity with negligible monetary value. Unlike
Multibit Wallet Recovered From Formatted Hard Drive After 5 Years
Software wallet
Survived 2013
In 2013, a Bitcoin holder stored funds in a Multibit wallet on a work desktop computer. The hard drive was subsequently formatted, and the user assumed the Bitc
Mac Formatted Without Backup: wallet.dat Recovery Attempt (2012)
Software wallet
Indeterminate 2012
On July 5, 2012, forum user Mashrock reported formatting a Mac computer running OS X 10.7 and subsequently losing access to Bitcoin stored in a wallet.dat file.
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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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