Marrying a Portuguese partner in Switzerland

For a Portuguese partner, the birth certificate comes from the Conservatória do Registo Civil and can be ordered online.

Birth certificate
Assento de nascimento em formato nacional com carimbo branco (national format, white stamp)
If divorced
Acta de Conferência of the divorce, showing the date it became final
Ordering
Conservatória do Registo Civil or online via Civil Online (with verification code)
Apostille
Portugal applies the Hague Convention; multilingual extracts (CIEC) are exempt
Translation
Required for documents in national format

Common pitfalls

The Swiss embassy asks for the national format: check before ordering a multilingual extract. The document must be less than 6 months old on the day the file is submitted.

Source: Swiss Embassy in Portugal.