CFR›Title 5›Chapter I›Part 839›Subpart D›Subject Group Erroneous CSRS or CSRS Offset ContainsSection 839.401CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Sections 839.401 § 839.401 What can I elect if I was put in CSRS or CSRS Offset by mistake? Next Erroneous FERS Erroneous FERS