Passphrase unavailable — software wallet (2020)

Survives

Case description

An October 2020 forum post describes a user who created their wallet passphrase by interleaving two separate phrases. They could recall both base phrases but not the interleaving pattern used. Multiple interleaving schemes were possible and the correct pattern required exhaustive testing.

Custody context

Stress condition	Passphrase unavailable
Custody system	Mobile or software wallet
Outcome	Survives
Documentation	Unknown
Year observed	2020
Country	Unknown

Structural dependencies observed

Single point of failure

Outcome interpretation

Access remained possible under the reported conditions.

Source

Publicly Reported

Evidence type

Forum post

Evidence link

https://bitcointalk.org/index.php?topic=255793.0

Related cases involving passphrase unavailable

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Framework references

Where Bitcoin Custody Intersects Legal and Fiduciary Authority

Where custody creates gaps in estate planning, fiduciary duty, and professional responsibility.

Professional Scope Boundary Matrix

What each professional or product covers, what they do not, and where gaps form between them.

The Independent Assessment Layer in Bitcoin Custody

How independent diagnostic layers emerge when multiple parties depend on shared infrastructure.