Multisig quorum failure — 4-of-7 multisig (2021)

Constrained

Case description

A DeFi protocol's 4-of-7 multisig treasury was paralysed in May 2021 when two key holders — both anonymous pseudonymous developers — disappeared after a governance dispute. With only five key holders identifiable, and no contact from two, the treasury could not be moved. The remaining key holders attempted to pass a governance vote to migrate to a new wallet but lacked the quorum to execute.

Custody context

Stress condition	Multisig quorum failure
Custody system	Mobile or software wallet
Outcome	Constrained
Documentation	Unknown
Year observed	2021
Country	Unknown

Structural dependencies observed

Institutional cooperation required

What this illustrates

The funds were held by a third party. When that party became unavailable, so did the Bitcoin. Whether full access was ultimately possible is unclear, but significant delay or outside intervention was involved.

Outcome interpretation

Access remained possible, but only with delay, dependence, or significant difficulty.

Source

Publicly Reported

Evidence type

Forum post

Evidence link

https://bitcointalk.org/index.php?topic=83794.0

Related cases involving multisig quorum failure

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This archive documents observed custody survivability failures. It does not attempt to document all Bitcoin losses or security incidents. Submit a case

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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.