U.S. officials uncovered a fraud scheme that resulted in almost $160,000 being stolen from an embassy in eastern Europe over a five-year period, according to a new State Department report.

The fraud was little more complicated than stealing from a cash register, but poor security controls at the U.S. Embassy in Georgia allowed it to continue from 2010 to 2014. In total, $159,700 was lost, “likely due to the misappropriation of cash” from the retail store safe by a former employee, according to an audit. The loss of funds was hidden for years because the thief deleted receipts from the accounting records in order to cover up the shortages.