7.5.2. Provide a refresh method for each CAPTCHA
For each CAPTCHA (anti-spam system), a way for refreshing the content must be provided, because the user is often unable to decipher the CAPTCHA at the first attempt.
Tip
A good practice is to propose, in addition to the refresh solution, a way of contacting the website administrator in the event that the CAPTCHA value cannot be entered (link to a “Contact” page, telephone number, etc.).
Examples
In this CAPTCHA, the link “Reload” provides the user with a new image
if the current one is difficult to read.