5 C.F.R. § 838.234 Collection of arrearages.
Title 5 - Administrative Personnel
Specific instructions are required before OPM may pay any arrearage. Except as provided in §838.225(b), OPM will not increase a former spouse's share of employee annuity to satisfy an arrearage due the former spouse. However, under §838.225, OPM will prospectively honor the terms of an amended court order that either increases or decreases the court order's entitlement.
Title 5: Administrative Personnel
PART 838—COURT ORDERS AFFECTING RETIREMENT BENEFITS
Subpart B—Procedures for Processing Court Orders Affecting Employee Annuities
Payment Procedures
§ 838.234 Collection of arrearages.