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Attention!

Fraudulent emails are currently circulating in the name of OASI.

Updated on 29 Sept 2026

These messages state that your OASI insurance certificate has expired and invite you to renew it online. This is a phishing attempt aimed at obtaining your personal and sensitive data.

OASI/DI in Swiss social security

Old-age and survivors’ insurance (OASI) and disability insurance (DI), which fall under the remit of the CCO, are an integral part of the Swiss social security system. They are at the heart of the first of the three pillars set out in the Federal Constitution of the Swiss Confederation.

Illness, maternity, accidents, family allowances and unemployment also fall within the areas covered by the Swiss social security system. Shortly after OASI came into force, followed by DI in the middle of the 20th century, Switzerland began to conclude social security agreements with various countries, continually expanding its network to this day.

You will find below some information on the Swiss social security system:

OASI/DI in Swiss social security

Other areas of Swiss social security

From the birth of OASI/DI to the conclusion of social security agreements