If you cannot find your CSA number, do not panic. You can retrieve it through a few different channels:
If you receive partial "interim" payments while your application is being processed, the CSA number will be listed on the payment statements. opm retirement claim number
OPM will mail you a formal notice once they have received your retirement package. This letter prominently displays your CSA number. If you cannot find your CSA number, do not panic
To log into the OPM Retirement Services Online (RSO) portal, you must have your claim number. This letter prominently displays your CSA number
Once you submit your federal retirement application to the Office of Personnel Management (OPM), you will receive a unique (often formatted as CSA or CSF followed by digits, e.g., CSA 1234567 ). This number is your claim’s official identifier and is critical for tracking your case through OPM’s adjudication process.