If a beneficiary has been unduly paid by a competent institution of a Contracting Party and he receives a benefit by the competent institution of the other Contracting Party, the former competent institution may request to balance the undue payment with the arrears or amounts still due to the beneficiary in the latter Contracting Party. The latter competent institution shall deduct the amount in accordance with, and within the limits of, the legislation applied by that competent institution, and will remit the amount to the competent institution entitled to reimbursement.