Part of the CustodyStress archive of observed Bitcoin custody incidents
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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)
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
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
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
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
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
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
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.
Browse by trigger and stress condition
Forgotten Passphrase — Passphrase unavailable
Owner Death — Owner death
Passphrase Unavailable — Passphrase unavailable
File Deleted — No Backup — Seed phrase unavailable
Device Loss Without Backup — Device loss
Device Discarded — Seed phrase unavailable
Physical Coercion — Coercion
Exchange Collapse — Vendor lockout
Exchange KYC / Account Lockout — Vendor lockout
Seed Never Recorded — Seed phrase unavailable
Passphrase Never Recorded — Passphrase unavailable
Institutional Failure — Vendor lockout
All cases
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