Alert

Fraudulent emails

Updated on 31 Mar 2026

Emails are currently circulating which claim to be from the Federal Social Insurance Office, in which the sender asks the recipient to provide their OASI (Swiss social security) number so that the FSIO can proceed with a review of their case file.

Published on 31 March 2026

Phishing emails

The Federal Social Insurance Office NEVER asks insured persons or organisations to share/verify sensitive data like OASI numbers via email or telephone.

Emails are currently circulating which claim to be from the Federal Social Insurance Office, in which the sender asks the recipient to provide their OASI (Swiss social security) number so that the FSIO can proceed with a review of their case file. These are scam, or ‘phishing’, emails.

Action to take

  • Immediately delete the fraudulent email. Do NOT click on any links in the message.
  • If you are contacted by phone, do NOT disclose any personal information during the call.
  • You can report the incident directly to the National Cyber Security Centre (NCSC).