Incapacities for work in France: New mandatory paper forms

Since 1 July 2025, the use of a secure Cerfa paper form has been mandatory in France for sick leave. This form includes several security features (hologram, magnetic ink, etc.).

The old, non-secure Cerfa forms are no longer valid and, as of 1 September 2025, they will be officially rejected by the French health insurance.

Consequently, the CNS will also only accept the new secure Cerfa forms for processing sick leave certificates issued in France.