How many people affected? Roughly 445,000 retirees.
What was the response? CaIPERS notified each victim in a letter. The agency is also reviewing its policies, initiating an employee awareness training course and investigating whether it can replace SSNs with some other unique identifier.
Details: The mistake happened because staff did not realize the address files contained SSNs.
Quote: "While it is unlikely that someone would recognize the series of numbers as being a Social Security number except you, we consider this a serious incident," the alert letter read.
Source: "Apology sent over CaIPERS privacy error," Aug. 22, Sacramento Bee.