or beneficiary, it may do so, subject to the following conditions: (A) No interest or other additional amounts (such as collection costs or fees) are sought on overpaid amounts. (B) If the plan seeks to recoup past overpayments of a non-decreasing periodic benefit by reducing future benefit payments— (i) the reduction ceases after the plan has recovered the full dollar amount of the overpayment, (ii) the amount recouped each calendar year does not exceed 10 percent of the full dollar amount of the overpayment, and (iii) future benefit payments are not reduced to below 90 percent of the periodic amount otherwise payable under the terms of the plan. Alternatively, if the plan seeks to recoup past overpayments of a non-decreasing periodic benefit through one or more installment payments, the sum of such installment payments in any calendar year does not exceed the sum of the reductions that would be permitted in such year under the preceding sentence. (C) If the plan seeks to recoup past overpayments of a benefit other than a non-decreasing periodic benefit, the plan satisfies requirements developed by the Secretary of the Treasury for purposes of this subparagraph. (D) Efforts to recoup overpayments are not made through a collection agency or similar third party and such efforts are not accompanied by threats of litigation, unless the responsible plan fiduciary reasonably believes it could prevail in a civil action brought in Federal or State court to recoup the overpayments. (E) Recoupment of past overpayments to a participant is not sought from any beneficiary of the participant, including a spouse, surviving spouse, former spouse, or other beneficiary. (F) Recoupment may not be sought if the first overpayment occurred more than 3 years before the participant or beneficiary is first notified in writing of the error. (G) A participant or beneficiary from whom recoupment is sought is entitled to contest all or part of the recoupment pursuant to the plan’s claims and appeals procedures. (H) In determining the