Indicate in the alternative text for visual CAPTCHA where to find the non-visual version

Whenever a visual CAPTCHA is used, indicate in the alternative text the information needed to:

  • Identify it as a security system.
  • Find the non-visual version of the CAPTCHA.
Screen capture, see description below.

It is often an audio version, so in this case opt for:

<img src="captcha.png" alt="Spam protection system: If you can’t use it, use the audio version available below." />


To correctly enter the alternative text in compliance with the CAPTCHA integration technique, refer to sheets on the topic Images and icons.


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