Please find below general information on the international recognition and legalization of documents as well as on the Apostille required for Hong Kong documents:
Foreign documents are often only recognised by the authorities of another state if their authenticity and evidentiary value have been confirmed by a special procedure. Procedures of international recognition have been developed to certify that documents were issued correctly by the competent agency.
Please note that since both Germany and the Hong Kong Special Administrative Region have signed the "Hague Treaty of October 5, 1961", an official Hong Kong document (such as birth or marriage…
Sometimes, even when abroad, Germans and foreigners may need to have documents certified or signatures or manual signs, transcripts or copies authenticated. Local notaries and authorities are not always able to be of assistance if the document in question is required in Germany.