Registration of Marriage in the Population Information System
If you are a Finnish citizen and you get married abroad, you must notify the marriage to the Finnish Population System.
Ask the person conducting the marriage, what documents are needed when the ceremony is performed before a foreign public authority. A Finnish certificate of no impediment can be ordered in multiple languages from the Digital and Population Data Agency in your municipality of residence. Documents that are used abroad, must be legalised.
Some priests working among expatriate Finns, who are employed by Evangelical Lutheran Church of Finland (list in Finnish), have the right to conduct marriages abroad.
You cannot get married at an embassy of Finland.
Notify the marriage to the Digital and Population Data Agency
When a Finnish citizen gets married outside Finland it must be notified to the Local Register Office. You can also leave the notification at a Finnish embassy or send it there to be posted to the Digital and Population Data Agency.
The original marriage certificate or a copy of it, authenticated at the mission of Finland, must be appended to the notification. The document must be legalised and if it has been issued in some other language than Finnish, Swedish or English, an authorised translation in one of these languages must be provided. Translations made abroad must be legalised. Translations made by an authorised translator in Finland are valid as such.
An Apostille stamp is not required for a marriage certificate, which is issued by an EU country authority and a translation of the certificate is not needed if a multilingual standard form is appended to the document.