Legalising a document using an Apostille
The Finnish authorities may ask you to legalise a foreign document. This should be done in the country where the document was issued.
If the country in question has signed the Hague Convention of 1961, the document can be legalised using an Apostille. For more information about Apostille certificates and the authorities that issue them, visit the Hague Conventions website.
A document issued by the Philippine authorities should be apostilled by the Departement of Foreign Affairs of the Philippines, https://www.apostille.gov.ph/.