/ˌæfəˈdeɪvɪt ʌv ˈsɜːrvɪs/ – Phrase
Definition: Bản tường trình về việc phục vụ (dịch vụ pháp lý).
A more thorough explanation: a written statement swearing to the truth of the fact that a legal document has been duly delivered to a person
Example: An affidavit of service must be filed with the Court 3 working days before the court date