Is it possible to provide a user with a knowledgebase article that could resolve their problem before they submit a ticket? If they can fix it themselves, this might stop unauthorized tickets from being entered. Though I could be wrong, I seem to remember that the pre-entry prompt was anticipated during our onboarding.
Currently, after a ticket has been entered, if a problem matches a knowledgebase article, a link to the article is displayed at the bottom of the page. This is only visible if you scroll down, but I'm assuming that it depends on the zoom level of your browser. At the very least could that post-entry link be moved up higher on the page so it is accessible if a pre-entry prompt is not possible?