Direct MSU to strengthen its procedures for booking and approving travel expenses. Updated procedures could include: • Requiring travelers to perform a cost comparison when booking flights that include any unallowable upgrades so the travelers are able to document the difference in cost between the standard economy airfare and the airfare including the upgrades. • Requiring personnel approving expense reports to verify that travelers actually performed the scheduled travel and that the travelers did not claim expenses for any unused, credited, or refunded expenses prior to approving expense reports.