StacksVerified U.S. regulatory reference

5 CFR §839.411

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
If you were placed in FERS due to a qualifying retirement coverage error and you should have been in CSRS, you may elect FERS or CSRS. If you were placed in FERS due to a qualifying retirement coverage error and you should have been in CSRS Offset, you may elect FERS or CSRS Offset. If you were placed in FERS due to a qualifying retirement coverage error and you should have been in Social Security-Only, you may elect FERS or Social Security-Only. This is summarized in the following chart: