They operate a postal servicing centre where the notarised document or public UK document is sent to the Foreign & Commonwealth Office Legalisation Office with payment proof and application form and they place the Apostille on the document before dispatching it to a nominated address.
Southeast Asia has an area of approximately 4,000,000 km2 (1.6 million square miles). As of 2013, Around 625 million people lived in the region, more than a fifth of them (143 million) on the Indonesian island of Java, the most densely populated large island in the world.
Indonesia is part of the Asian continent, wherever the Asian continent goes so does Indonesia. Indonesia is obviously in the Asian cultural sphere and so I would have to say that Indonesia is not its own continent but instead part of Asia.