The insurer sought repayment of IRBs paid to the claimant for a period she was working in a job with similar job duties to her pre-accident employment. Adjudicator Paluch granted repayment of $13,134.06 in IRBs. He held that the claimant’s return to work suggested that she did not suffer a substantial inability to engage in her employment. Because the repayment request was sent within 12 months of the overpaid IRBs, the insurer was entitled to recover all of it.