Section 838.123 - Claimants' responsibilitiesClaimants are responsible for-
(a) Filing a certified copy of court orders and all other required supporting information with OPM;(b) Keeping OPM advised of their current mailing addresses;(c) Notifying OPM of any changes in circumstances that could affect their entitlement to benefits; and(d) Submitting all disputes with employees or retirees to the appropriate State court for resolution.