Visual Verification

The Visual Verification is a program that can tell whether its user is a human or a computer. You've probably seen them - colourful images with distorted text at the bottom of Web registration forms. These are used by many websites to prevent abuse from "bots," or automated programs usually written to generate spam. No computer program can read distorted text as well as humans can, so bots cannot navigate sites protected by CAPTCHAs.

The Visual Verification consists of a set of images to select from. You need to choose all the images that meet the criteria the captcha has specified. If you are unable to do the forementioned with the set of images provided, you can click on the reload (Reload) button, which will give you a new set.

If you have a visual impairment that means you are unable to see the images, you can click on the audio (Audio) button and a set of numbers or words will be spoken through your speakers.

If unable to use the audio alternative to the visual verification, then please contact the CSD Service Desk for assistance - Email:, Telephone: +44 (0) 151 794 4567.