/əkˈnɒlɪdʒmənt əv kəmˈpleɪnt/ – Pharse
Definition: biên nhận đơn khiếu tố, đơn kiện.
A more thorough explanation: A written or oral statement acknowledging receipt of a complaint.
Example: I hereby acknowledge receipt of your complaint dated August 15, 2024, regarding the defective product you purchased from our store.