Once did a long trip to the F/E and we took a young WRAF Accounts Officer as the imprest holder. To cut many transactions short she ended up at the finish of the trip having made a substantial amount of money for HMG ! Despite my best efforts to advise her she insisted on putting it in as it was. Now imprests have to balance exactly as you cannot lose nor make money so she was in trouble. I spoke to OC Accounts on her behalf and somehow the matter was sorted. I never had a problem with any of my claims after that !.