Ordering a form S1

I use this form if I live in a country other than Germany, Belgium or France. You can find the links to the forms for these countries at the bottom of the page.

Fields marked with an asterisk (*) are mandatory.

Name*

Firstname*

13-digit identification number*

Address*

Postcode*

Town*

Country *

E-mail address (example: info@public.lu)*

Health fund in the country of residence*

National social security number (country of residence)*

Reason for request *

I request my S1 form by completing the required fields on the application and clicking PREVIEW. On the summary page, I carefully review the information one final time before confirming by clicking SEND.

Please note! By completing this form, I agree to my personal data being processed for the purposes of my request. I click here for more information on the CNS's data privacy policy.

Belgium, France or Germany

If you live in one of the countries bordering Luxembourg, click on the country where you live to order your S1/BL1 form.

The rules

I work in Luxembourg and I live in another country, so I'm a cross-border worker.

I have an important procedure to carry out in my country of residence: register with a local health insurance fund.

To register, I need a certificate that the CNS will send me - form S1!

If I have not received it automatically within 15 days of receiving the declaration of entry from the Joint Social Security Centre (CCSS), I can order the S1 form on this page.

The S1 form, issued by the CNS, allows me to register with a health insurance fund in my country of residence. This entitles me to receive treatment and reimbursement in my country of residence.

I can obtain further information on the CROSS-BORDER WORKERS page

Last update 16.07.2026