Why is pp used before signing on anothers behalf?

The abbreviation "pp" stands for "per procurationem," which is Latin for "by proxy." It is used before a signature to indicate that the person signing is doing so on behalf of another individual, typically in a formal or legal context. This notation clarifies that the signer has the authority to act for someone else, ensuring that the document is valid and that the responsibilities are properly assigned. Using "pp" helps prevent any misunderstandings regarding the signatory's capacity to bind the other party.