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    What do I need to do if my baby is born abroad (declaration, CNS, CAE)?

    Answered by the Kannerlux teamChecked November 2026

    Luxembourg communes register births that take place in Luxembourg, so when your baby is born abroad, the steps that usually follow a Luxembourg declaration are up to you. Get several official copies of the foreign birth certificate first: almost every step below needs one.

    • Health insurance (CNS): the CNS describes co-insurance as usually automatic for a newborn in Luxembourg. For a baby born abroad, send the birth certificate through the CNS contact form and ask the CNS to confirm the co-insurance.
    • Family allowance (CAE): apply on MyGuichet.lu or with the paper form, with the birth certificate and your bank details. The allowance is due from the month of birth.
    • Birth allowance (CAE): the birth allowance form is normally handed out in Luxembourg, so download it from guichet.lu or ask the CAE. For the postnatal allowance, request the form from the CAE.

    The birth allowance conditions still apply. The birth instalment needs the mother's postnatal examination by a gynaecologist-obstetrician and must be claimed within one year of the birth. The postnatal instalment needs 6 check-ups of the child before the 2nd birthday, by a paediatrician, GP or internal medicine specialist, and residents must raise the child in Luxembourg without interruption until then. It must be claimed within one year of the 2nd birthday.

    • Luxembourg passport: if your child was born abroad, the commune or passport office asks for a copy of the birth certificate. Documents in a language other than German, French, Luxembourgish or English need a translation by a sworn translator in Luxembourg.

    Non-residents who work in Luxembourg follow the same CAE steps, adding a residence or household composition certificate.

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