Do my foreign documents for an Indonesian PT PMA need legalisation?

An apostille is usually enough, because Indonesia has applied the Apostille Convention since 4 June 2022. That covers documents such as a corporate shareholder's certificate or a power of attorney for signing the deed. Documents from a country outside the Convention still go through legalisation at an Indonesian embassy.

Certification and apostille

Source: Status table: Apostille Convention, Hague Conference on Private International Law (HCCH)