Users receive a card containing pairs of numbers, similar to Transaction authentication numbers.

They have, however, been widely implemented in personal online banking, where they are known as Transaction Authentication Numbers (TANs).

A Transaction authentication number, TAN or T.A.N. is used by some online banking services as a form of single use one-time passwords to authorize financial transactions.

In Germany and many other countries like Austria and Brazil, those OTPs are typically called TANs (for 'transaction authentication numbers').

The access to the sedamo database is controlled by username, password, and transaction authentication numbers (TANs) which are provided by the software developer who licensed the sedamo technology, not by the CCCC itself.