Section 839.1204 - On what basis will OPM review claims under this subpart?(a) OPM will base its decision on only the written record, including all of your submissions and other documentation in OPM's possession.(b) At OPM's discretion, OPM may request your employer to provide an administrative report. The report may include:(1) A description of the retirement coverage error;(2) A statement as to whether a settlement or other court-ordered award was made;(3) The employer's recommendation for resolution of the claim; and(4) Any other information your employer believes OPM should consider.(c) The burden of proof that the criteria for approving a reimbursement of expenses is on you.