Part of the CustodyStress archive of observed Bitcoin custody incidents
Total Device and Home Loss
Archive cases where the primary access device was lost or destroyed with no off-site backup available. Cases in this category typically involve loss of the device as the sole access point.
77% of determinate cases in this category resulted in a blocked outcome.
36
Blocked
0
Constrained
11
Survived
60
Indeterminate
77% of determinate cases resulted in blocked or constrained access.
107 observed cases
Blocked
36 (34%)
Survived
11 (10%)
Indeterminate
60 (56%)
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
Bitcoin Core Wallet Database Lost After Disk-Full Error — Recovery Unknown
Software wallet
In November 2017, a Bitcoin Core user encountered a critical custody failure after receiving a 'no more free disk space' error notification while attempting to
15 BTC Lost to Smartphone Reset Without Backup – Private Key Format Unidentified
Software wallet
In November 2017, a BitcoinTalk forum user under the pseudonym 'Farer' posted a detailed account of custody failure involving a smartphone-based Bitcoin wallet
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
Armory Cold Wallet Restoration Created Unencrypted Wallet With Plaintext Private Keys
Hardware wallet (single key)
KillerTank maintained Bitcoin in offline cold storage on an air-gapped Raspberry Pi with an 18-word paper backup consisting of 4 random letters per set. In Dece
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
1,000 BTC Lost to Repeated Hard Drive Formats: 2009 Wallet Recovery Attempt
Software wallet
In January 2017, a BitcoinTalk forum user identified as myBitcoin2009 disclosed a custody failure spanning eight years. The user claimed to have received over 1
Corrupted 2013 wallet.dat Recovery via Community-Guided Disk Scanning
Software wallet
In December 2017, a macOS Bitcoin Core user attempted to restore access to two wallet.dat files created in late 2013. The user had downloaded a contemporary ver
Bitcoin Core Wallet Lost When Computer Discarded Without Backup
Software wallet
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
Bitcoin Core wallet.dat Corruption: Encrypted Wallet Unlock Failure
Software wallet
On July 27, 2017, forum user Houdini7 reported that their Bitcoin Core wallet, which had been active for approximately two days, began displaying a critical err
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
Accidental Wallet.dat Deletion on Mac SSD — Unrecoverable Bitcoin Loss
Software wallet
On November 2, 2017, a Bitcoin user identified as chrisf199 posted on BitcoinTalk seeking professional help to recover a wallet.dat file they had accidentally d
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
Corrupted Encrypted wallet.dat Recovered via Partition-Level Recovery
Software wallet
In March 2016, a Bitcoin Core user discovered their only backup of an encrypted wallet.dat file had become corrupted, likely due to improper shutdown of Bitcoin
Deleted Encrypted Wallet Without Backup: Private Keys Lost
Software wallet
In November 2016, a Bitcoin Stack Exchange user posted about deleting their wallet file during a computer wipe, having never created a backup. The user had conv
Recovering Deleted Bitcoin Core wallet.dat via pywallet: Device Loss and Forensic Key Extraction
Software wallet
Edgar's Bitcoin Core wallet became inaccessible in 2015 when the wallet.dat file was removed from the active system while the Bitcoin Core client remained open.
Forgotten Bitcoin Wallet on Lost Amazon Fire Phone: Data Recovery Failure
Software wallet
In 2015, a friend transferred approximately $10 worth of Bitcoin to a user's Amazon Fire phone using a mobile wallet application as payment for donuts. The user
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
MultiBit Wallet on Stolen Laptop: Recovery Phrase Format Ambiguity Blocks Access
Software wallet
In 2014, mcsteely purchased Bitcoin from a Bitcoin ATM and sent it to a MultiBit wallet installed on a laptop. The device was subsequently stolen. At the time,
20 Bitcoin Wallets Lost to Hard Drive Failure—Manual Recovery via Data Forensics and Private Key Extraction
Software wallet
In August 2014, Lucky Cris experienced simultaneous hardware failure affecting both primary and external backup drives, rendering all Bitcoin holdings inaccessi
Windows System Refresh and Data Recovery Failure: Bitcoin Permanently Inaccessible
Software wallet
In 2014, sachalamp's Windows 7 or 8 computer experienced a system failure. The user performed a Windows refresh operation, which reset Bitcoin Core and severed
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
Translate