Here are two cute examples from this week starring yours truly, both concerning travel reimbursements.
No point in naming the organizations responsible; one was state and the other federal; nor in criticizing the administrators I interacted with, who were only following the rules, but;
(1) A form was returned to me as invalid because I had claimed ONE CENT less than the amount on the receipts.
Moral: Make sure we spend $100 of effort to correct a 1 cent mistake.
(2) A travel claim that has been bouncing around for two years (!) was finally definitively refused because, in a attempt to save taxpayers' money on a flight, I had purchased a round trip international ticket for $184 on a low-budget airline (Ryanair) that had only one class. As no class was specified on the ticket this meant it couldn't be reimbursed.
Moral: Let's make sure we discourage personal initiatives to save taxpayers' money.