Topic
What is a multisig wallet?
Last reviewed:
- Quick fact 1
Multisig means a payment needs signatures from several keys, such as 2 of 3.
- Quick fact 2
In a 2-of-3 setup, any two of the three keys can sign.
- Quick fact 3
How keys are stored and backed up is the core choice in self-custody.
Source: SEC Investor Bulletin: Crypto asset custody basics for retail investors (Dec 12, 2025)
The short lesson
A normal wallet has one key. Whoever has that key can move everything. A multisig (multi-signature) wallet needs more than one key to approve a send.
A common setup is “2 of 3”: there are three keys, and any two must sign. You might keep one at home, one in a safe place elsewhere and one with a trusted person or service.
Why people use it:
- One stolen key is not enough for a thief.
- One lost key is not a disaster. The other two can still move funds.
- Shared control. A family or a business can require two people to agree.
What can go wrong:
- More moving parts. You must back up each key, and often a setup file that describes the wallet.
- Lose too many keys and the funds are stuck for good.
- Setup mistakes are easy for beginners.
Multisig is a tool for people who already understand single keys. Learn Lessons 1 to 3 first.
Related terms
Go deeper in Lesson 2: What a key is
Common questions
What does 2 of 3 mean?
There are three keys and any two must sign to move funds.
Is multisig safer?
It can remove a single point of failure, but it is more complex. Mistakes in setup or backup can lock funds.
Do I need multisig as a beginner?
Not at the start. Learn how one key and one seed phrase work first.
Does multisig work the same on every blockchain?
No. Bitcoin builds it into transactions; Ethereum usually uses a smart contract wallet.