Who can certify true copy in Hong Kong?

Could you please elaborate on who in Hong Kong possesses the authority to certify a true copy? Given the complex legal framework and rigorous documentation requirements in the financial and legal sectors, it's crucial to understand the proper channels for such certification. Are there specific government agencies, legal professionals, or notary publics that are authorized to perform this task? Additionally, what are the standard procedures and requirements for obtaining a certified true copy in Hong Kong? Clarifying these details would greatly assist in ensuring the legitimacy and authenticity of documents in legal and financial transactions.