CustodyStress
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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.

Archive analysis — 199 cases
Outcomes
100% of determinate cases resulted in blocked access — 31 percentage points above the archive-wide average of 69%. Only 0% resulted in recovered access — one of the lower survival rates in the archive.
Custody type
44% of cases involved exchange custody, followed by software wallet at 43%.
Documentation
48% of cases had present and interpretable documentation — yet still produced a blocked or constrained outcome.
Time distribution
Cases span 2010–2025. Only 10% occurred in 2022 or later — concentrated in earlier periods.
Structural dependency
61% of cases carry a single-person knowledge dependency tag — the most common structural factor in this subset.
199
Blocked
0
Constrained
0
Survived
0
Indeterminate

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

199 observed cases
Blocked
199 (100%)
Los Angeles Wildfire Destroys Only Seed Phrase Backup — Total Loss
Software wallet
Blocked 2025
In January 2025, a Reddit user reported that their 70-year-old aunt had lost her entire cryptocurrency savings during the Los Angeles wildfires. The aunt had st
Lost Phone Containing All Wallets; $300 Trapped in Unknown Address
Software wallet
Blocked 2025
On July 7, 2025, a user copied what they believed to be their own wallet address from their phone's clipboard and sent $300 in Bitcoin to it. The transaction co
Trezor Model T Passphrase Loss: 0.7175 BTC On-Chain, Inaccessible
Hardware wallet with passphrase
Blocked 2025
In late December 2025, jwsutherland transferred approximately 0.7175 BTC from the Canadian exchange Newton to a native SegWit (bech32) address generated by a Tr
Inherited Bitcoin Core Wallet with Forgotten Passphrase: No Technical Recovery
Software wallet
Blocked 2025
In May 2025, a user posted to Bitcoin Stack Exchange describing an inheritance custody failure: their father created a Bitcoin Core wallet years prior and then
Bitcoin Sent to Closed Cash App Account: Permanent Loss
Exchange custody
Blocked 2025
A Bitcoin holder attempted to deposit cryptocurrency into a Cash App account, unaware that the account had already been closed by the platform for terms-of-serv
Blockchain.com Non-HD to HD Wallet Migration: Imported Address Bitcoin Inaccessible
Exchange custody
Blocked 2024
In 2016, user serega634 maintained a Bitcoin wallet on Blockchain.com, then a widely-used custodial online wallet platform. At an unspecified later date, the us
BitcoinTalk Seed Phrase Loss Reports: Computer Crash, Device Corruption, Paper Wallet Failures
Software wallet
Blocked 2024
On January 26, 2024, BitcoinTalk user riverdip initiated a community thread soliciting incident reports about Bitcoin inaccessibility. The thread surfaced multi
Bitcoin Core Wallet Encryption Generated New Seed: Lost Access to Funded Addresses
Software wallet
Blocked 2024
In June 2024, a Bitcoin Core user deleted their server and all associated data, but retained a backup copy of wallet.dat on their computer. The user encrypted t
50–100 Bitcoin Lost on Old Hard Drive Due to Missing Passphrase
Software wallet
Blocked 2024
In December 2024, a professional contacted Stack Exchange reporting that a colleague possessed 50–100 bitcoins stored on an old hard drive in a bitcoin-qt walle
Lost Recovery Seed on Trezor Hardware Wallet: Permanent Access Failure
Hardware wallet (single key)
Blocked 2024
In January 2024, a BitcoinTalk user identified as carlosrodriguez88 reported a critical access failure involving a Trezor hardware wallet running firmware versi
Ledger HW1 v1.0.1 Device Locked: Firmware Obsolete, Seed Phrase Lost, No Recovery Path
Hardware wallet (single key)
Blocked 2024
In March 2024, a BitcoinTalk forum user (nimrodlehavi) reported complete inability to access Bitcoin stored on a Ledger HW1 version 1.0.1 hardware wallet. The u
Coldlar Pro3 Hardware Wallet: Valid Seed Phrase Insufficient Without Payment Password
Hardware wallet with passphrase
Blocked 2023
On December 4, 2023, a Bitcoin user identified as zzzccc posted to BitcoinTalk describing a critical custody access failure involving a Coldlar Pro3 hardware wa
Seed Phrases Lost in Computer Reformat — angrybirdy's Unrecoverable Self-Custody Failure
Software wallet
Blocked 2023
angrybirdy, a BitcoinTalk Sr. Member, accumulated Bitcoin through legitimate cryptocurrency work: signature campaigns and white paper translation projects condu
Blockchain.com and Exchange Account Loss: Two Cases of Forgotten Credentials and Theft
Exchange custody
Blocked 2022
Two separate custody failures surfaced on BitcoinTalk in January 2022, both rooted in lost access to hosted wallet platforms. Kortez011 reported losing access t
150 BTC Passphrase Lost — No Recovery Method Available
Software wallet
Blocked 2022
On August 19, 2022, a user posted to Bitcoin Stack Exchange describing loss of access to a Bitcoin Core wallet containing 150 BTC (valued at approximately €3.2
Bitcoin Armory Private Key Lost After Health Issue: 60 BTC Inaccessible
Software wallet
Blocked 2022
In May 2022, a Bitcoin holder reported losing access to approximately 60 Bitcoin stored in Bitcoin Armory since 2014. The loss occurred following a health probl
Three Arrows Capital Collapse: $10B Fund, $3.5B Frozen Claims, Founder Flight
Institutional custody
Blocked 2022
Three Arrows Capital, founded in 2012 by Zhu Su and Kyle Davies, operated as a cryptocurrency investment fund managing approximately $10 billion in assets throu
Phone Lost With 12-Word Recovery Phrase Stored: Permanent Bitcoin Loss
Software wallet
Blocked 2022
On April 4, 2022, a Bitcoin holder reported losing their mobile phone on which they had stored their 12-word recovery phrase. The user retained knowledge of the
Paxful Insolvency: Withdrawal Request Trapped in Administrative Limbo
Exchange custody
Blocked 2022
Paxful, a peer-to-peer Bitcoin marketplace, announced its closure between 2021 and 2022. One user failed to notice the shutdown notification amid email volume a
Electrum Watch-Only Wallet With Lost Seed Phrase: No Recovery Path
Software wallet
Blocked 2021
In June 2021, a BitcoinTalk user (Ed801) discovered that their Electrum wallet, created nine months prior in September 2020, had become functionally inaccessibl
Astamur Ardzibna Shot Dead in Abkhazia Over Cryptocurrency Mining Operation
Unknown custody system
Blocked 2021
Astamur Ardzibna was fatally shot in October 2021 during an armed dispute over cryptocurrency mining operations in Abkhazia, the de facto independent territory
Recovery Phrase Failed to Restore Imported Addresses: Funds Permanently Inaccessible
Software wallet
Blocked 2021
A Blockchain.com user had deposited Bitcoin into imported addresses within their wallet application, unaware that funds in imported addresses required separate
Bitcoin Lost After Hard Disk Format Without wallet.dat Backup
Software wallet
Blocked 2021
A Bitcoin Core user received bitcoin in 2013 but did not understand the criticality of wallet.dat at that time. In 2017, the user formatted their hard disk and
Coinbase Wallet Lockout with Corrupted Google Drive Backup
Exchange custody
Blocked 2021
In June 2021, a Coinbase Wallet user reported being locked out of their account but believed recovery was possible because they had exported a backup file to Go
Altsbit Exchange Hack (February 2020): Institutional Failure, Partial Recovery
Exchange custody
Blocked 2020
Altsbit, an Italian cryptocurrency exchange that had been operational for only a few months, suffered a catastrophic security breach in February 2020. Attackers
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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.

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