Where a document is required to be produced in support of the application for Citizenship by Investment, it must be certified and authenticated in accordance with the law of the jurisdiction from where the document originates.
The person certifying the document must provide the following information; full name in capitals, the capacity in which the person is acting, residential or business address, telephone number and e-mail address.
Where a notary public certifies a document to be a true copy of the original, that document must be authenticated by:
1. Apostille
a) An apostille in accordance with the provisions of the Hague Convention of 5th October 1961 abolishing the requirement for legislation for foreign public documents, in the case of a jurisdiction that is a party to that convention.
You can find the issuing authorities for Apostille in your country here..
https://www.hcch.net/en/states/hcch-members
2. Notary Public
b) Validation of the certificate of the notary public by the appropriate government department in the case of a jurisdiction that is not a party to that convention.