Establishment of parenthood
As a rule, parenthood should be established in the child's country of residence in accordance with the legislation of that country. A final decision on parenthood issued in a foreign state can be recognised in Finland without separate confirmation.
A decision of a court or another authority and the establishment or registration of a legal transaction is deemed a decision if the relationship between the persons concerned is considered a relationship between a child and a parent as a result of such a measure in the state where the registration or other measure was carried out.
Where necessary, the Helsinki District Court may confirm, upon application, whether a decision on parenthood issued in a foreign state is to be recognised in Finland.
Establishment of paternity in Thailand
Contact the competent authorities: the district office (Amphoe) and the Juvenile and Family Court in Thailand.
Finnish authorities require an English translation of the birth certificate of a child born out of wedlock. If the father also is a guardian of the child, a certificate of guardianship and a certificate of the acknowledgement of paternity (the decision on the confirmation of paternity) are also required. Have these documents, both the originals and their English translations, first legalised at the Ministry of Foreign Affairs of Thailand and thereafter at the Embassy of Finland in Bangkok so that they will have legal validity in Finland. See the specific instructions on legalisation.
Submit a Notification of a Finnish citizen born outside Finland to the Digital and Population Data Services Agency.