Browsers can be configured never to cache content. If UA is to be offered in a "kiosk" or other publicly available guise, then the browser should be configured never to cache content.
Furthermore, it is advisable to customize UA in order to provide this guidance to citizens accessing the site via their own browsers. They should be advised to clear their cache and close all browser windows they have used when they are finished using UA. Citizens should also be made aware that PDF documents that they download from UA may need to be removed from the browser's temporary Internet files.