Glossary / Security & encryption

OTP (One-Time Password)

An OTP is a short code that works exactly once and expires within minutes, delivered by SMS, email, or generated by an authenticator app. Because it can't be reused, an intercepted OTP is worth almost nothing moments later. OTPs also enable passwordless login — our client portal uses them so clients sign in with the contact details already on their agreement, with nothing to remember or reset.