Contesting the validity of court orders
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
(a) An employee, separated employee, or retiree who alleges that a court order is invalid must prove the invalidity of the court order by submitting a court order that—
(1) Declares the court order submitted by the former spouse is invalid; or
(2) Sets aside the court order submitted by the former spouse.
(b) OPM must honor a court order acceptable for processing that appears to be valid and that the former spouse has certified is currently in force and has not been amended, superseded, or set aside, until OPM receives a court order described in paragraph (a) of this section or a court order amending or superseding the court order submitted by the former spouse.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.