Apostille is certificate which verifies and confirms the seal and signature of person who authenticated the document. Not all countries can issue Apostille, but only the countries who had signed ‘Hague Convention Abolishing the Requirement of Legalisation for Foreign Public Documents’.
As Singapore is not a party to the Convention, Singapore Notary Public cannot issue Apostille.
An alternative to Apostille is the Singapore Notary Public will issue a Notarial Certificate, usually to be authenticated by the Singapore Academy of Law, and then further legalised by the releavant foreign Embassy in Singapore. Sometimes, there is a requiement to be legalised by the Singapore’s Ministry of Foreign Affairs (MFA) prior to the legalisation in the Embassy. You are advised to check with the Foreign Agency requesting for the legalised documents as to their requirements.