/tə saɪn ɒn bɪˈhɑːlf ʌv/ – Phrase
Definition: ký nhân danh ai đó, ký thay.
A more thorough explanation: “To sign on behalf of” refers to the act of signing a document or agreement as a representative of another person or entity, typically with the authority to do so. This action indicates that the signer is acting on behalf of the other party and is legally authorized to bind them to the terms of the document through their signature.
Example: The attorney was authorized to sign on behalf of the client in the real estate transaction.