If you have not yet received your OASI card or if you have lost it, you can fill out the application form available on the OASI/DI website and return it to your employer.
You will then be sent a (new) OASI card.
If you have not yet received your OASI card or if you have lost it, you can fill out the application form available on the OASI/DI website and return it to your professional fund association or your cantonal compensation office to which you make your contributions:
You will then be sent a (new) OASI card.
If you live abroad and do not work in Switzerland and have never received or have lost your OASI card, you should contact the Swiss Compensation Office, which can issue with you with one or provide a replacement.
If you live abroad but work in Switzerland, please refer to the sections ‹If you are an employee› or ‹If you are self-employed or not working› to find out how to obtain a (new) OASI card.
This webpage of the Federal Social Insurance Office (available in German, French and Italian) provides detailed information about the OASI number.