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A birth certificate is issued by the civil register office in your place of birth. It can be required for different reasons:
To obtain a birth certificate you must provide an official piece of identification and an address to which the document can be sent. A fee of 30 francs (plus postage) is charged.
If you order a birth certificate for somebody else, you should have a power of attorney and a copy of the person’s piece of identification. A power of attorney is not required when you order a birth certificate for your children, if they are under 18.
You can obtain a birth certificate from the civil register office in your place of birth.