/ˈsɜːtɪfaɪd truː ˈkɒpi/ – Phrase
Definition: sao y bản chính.
A more thorough explanation: A certified true copy is a duplicate of an original document that has been verified and confirmed as an accurate reproduction by a qualified authority, such as a notary public or other authorized individual. This certification indicates that the copy is a true and faithful representation of the original document.
Example: A certified true copy of the contract was submitted to the court as evidence.