1.12 If using biometric identification, provide an alternative access security mechanism for users who do not possess the required biological characteristic

Do not use a single biometric identification methods, such as fingerprint, iris pattern or speech pattern recognition, as the only user identification method. If any of these are used, provide users who do not have the required biological characteristics with an alternative method, such as a different biometric identifier or a PIN code.


Biometric identification methods rely on identifying biological attributes which are unique to the individual human being, such as fingerprints, iris patterns or speech patterns. However, for each of these characteristics, there is some proportion of the user population who do not have the required biological part. They may, for example, have no hands, no irises or no ability to produce constant natural speech. However, they must still have a way to identify themselves to the terminal.

Directions and Techniques

There are no specific techniques recommended for this guideline.

How you could check for this:

There are no specific test methods recommended for this guideline.