WHAT ARE IMAGE VERIFICATIONS FOR?
By proper name, these image verification on Web forms are called a turning number (read the definition here on Webopedia.com) and are appearing more frequently on Internet contest pages. These randomly generated images will display numbers or characters that you must enter correctly into the form field in order to submit a contest form. If you do not enter the characters or enter them incorrectly, your form submission is not accepted. These image verifications are used on contest pages to ensure the entry is being made by a real human, and not by script, robot or any other means of automated contest entry. Most automated entry programs will not be able to ready and copy the characters in the image verification box.
