What are multi‑signature accounts?

A multi‑signature (multi‑sig) account requires multiple parties to approve transactions. Instead of a single private key, the account has a list of signers and a threshold (M‑of‑N). For example, a 2‑of‑3 multi‑sig requires any two signers to approve a payment. Multi‑sig accounts reduce the risk of unilateral compromise and are recommended for organisations or high‑value accounts.