A supplier that issues payment cards to customers.
What is a TAN?
A transaction authentication number, or TAN, is used by some issuing banks as a kind of single-use one-time password (OTP). It adds a second level of security in Internet banking with so-called “two-factor authentication”. TANs are typically six or eight characters long.
Different TAN delivery approaches
- TAN lists on paper
- TAN by text message
- TAN generator
- TAN via QR code