Multisig

A wallet that needs approval from several keys, such as 2 of 3, before funds can move.

A multisignature (multisig) wallet requires more than one key to approve a transaction. A common setup is 2-of-3: three keys exist, and any two can move funds.

Multisig removes the single point of failure of one seed phrase and is popular for larger holdings and inheritance planning, but it's more complex to set up and recover.