Multisig in Theory vs Practice

A 2-of-3 wallet requires two valid signing keys. It reduces reliance on one key only when those keys are independently controlled. A single person or compromised system holding two keys can still meet the threshold. Recovery also needs the correct wallet configuration and people able to coordinate.

In practice, it's a coordination nightmare for people who didn't set it up.

Your heirs must:

  1. Understand what multisig IS
  2. Know who holds the other keys
  3. Contact those key holders
  4. Coordinate signing a transaction across multiple devices
  5. Do all of this while grieving, potentially across time zones, with people they may not know

Your spouse is crying at your funeral. Your business partner is in Bali. Your lawyer doesn't know what a "PSBT" is.

That's your inheritance plan?

The Coordination Tax

Every additional signer adds: • Communication overhead • Schedule coordination • Technical skill requirements • Trust dependencies • Points of failure

A 3-of-5 multisig has 10 possible signing combinations. Your heir doesn't know which 3 people to contact, or even that they need exactly 3.

And here's the worst part: multisig setups change over time. You added your college friend as a signer in 2022. You haven't spoken to him since 2024. He moved, changed his phone number, and lost his hardware wallet.

Your elegant security architecture just became a single point of failure.

Preserve the quorum instead of defeating it

Do not gather enough signing keys to defeat the multisig threshold and place them in one vault. That recreates the single point of compromise the multisig was designed to remove.

Document the wallet policy, quorum, descriptors or configuration backup, signer roles, device types, derivation information, verification addresses and the process for replacing a signer. Keep each key under independent custody. A ZeroLatch delivery can hold the non-secret map and instructions for one authorised recipient; separate deliveries may support distinct roles without combining keys.

Rehearse a low-value transaction with the future coordinator and required signers. Confirm the recipient can verify addresses, assemble the transaction, obtain the required approvals and recognise a compromised device. Review the design whenever a signer, key, wallet implementation or legal role changes.