Republicans on the House Oversight and Government Reform Committee have asked the California National Guard to turn over documents related to illegal bonuses given to military personnel more than a decade ago that they may now have to repay, in effort to ensure those responsible for the mixup are held accountable.

In a letter sent to Gen. Joseph Lengyel at the National Guard Bureau, and Adjutant Gen. David Baldwin of the California National Guard, the lawmakers cited news reports showing that nearly 10,000 soldiers “have been ordered to repay bonuses in excess of $15,000.” Those payments were initially required after audits showed the bonuses and student loan repayments were unwittingly received by people who didn’t qualify for them.