If a document is issued in a foreign country which has joined the Hague Convention Abolishing the Requirement of Legalisation for Foreign Documents of 5 October 1961, it must be authenticated with an Apostille by the competent institution of the relevant foreign country.
Document issued in the EU, the member states of the European Economic Zone and in the Swiss Confederation can be submitted to Latvian institutions without any further authentication.
A document issued in a foreign country which has not joined the Hague Convention Abolishing the Requirement of Legalisation for Foreign Documents of 5 October 1961 must be legalised by the competent institution of the relevant country (its foreign ministry or a diplomatic/consular mission) and then – by the Consular Department of the Ministry of Foreign Affairs.
In line with international practice and the Cabinet Regulation No 264 of 18.06.2019, “Regulations for Legalisation of Public Documents”, prior to legalising documents of certain countries at the Consular Department, the documents must be legalised both at the Ministry of Foreign Affairs of the issuing country and the embassy of the issuing country. See here the list of those countries and embassies to which these legalisation requirements apply.
Documents cannot be legalized if the Ministry of Foreign Affairs does not have at its disposal a specimen signature of the undersigning official and a sample of the relevant seal or stamp of the foreign country.