====== 7.5.1. Provide an alternative to each CAPTCHA that is either just sound or visual ======

For each CAPTCHA (anti-spam system) that is either just sound or visual, an alternative must be provided. For example:
  * A sound alternative for a visual CAPTCHA.
  * A visual alternative for a sound CAPTCHA.
  * A text alternative in the form of a simple question for a sound or visual CAPTCHA.
  * Etc.

<note attention>**Warning**\\
CAPTCHA systems are designed to block spammers and use increasingly sophisticated methods to obstruct them. CAPTCHAs are therefore more and more difficult to decipher. By definition, a CAPTCHA will therefore never be completely accessible. With respect to accessibility, the best solution is to avoid them.
</note>

===== Examples =====

{{:notices:graphique-ergonomique:7.5-1-en.jpg?direct&|}}

//In this CAPTCHA, the link “Listen” provides the user with a sound version of the CAPTCHA.//

===== Related recommendations =====

<note bulle>
  * Previous recommendation: [[notices:graphique-ergonomique:prevoir-un-recapitulatif-des-donnees-renseignees-avant-la-soumission-finale-du-formulaire]]
  * Next recommendation: [[notices:graphique-ergonomique:prevoir-pour-chaque-captcha-une-solution-de-rafraichissement]]
</note>