This is called a Captcha. Captchas are used on sites like Transferr to stop 'bots' from creating accounts on the site. 'Bots' are automated programs which create accounts on sites and use them to send advertisements, spam email and add comments on some websites. Transferr is committed to your security and a pleasant experience on the site, this is why we require that every new account that is registered is legitimate and not a 'bot' or automated program creating a fake account.