A more thorough explanation:

Term: P. PRO

Definition: An abbreviation for "per procurationem" which means "by the agency of" or "on behalf of". It is often used in signatures to indicate that the person signing is doing so on behalf of someone else.

Example: John Smith signs a letter as "Jane Doe, p. pro." This means that Jane Doe has authorized John Smith to sign the letter on her behalf.

Explanation: The abbreviation "p. pro." is commonly used in legal and business contexts to indicate that someone is signing a document on behalf of someone else. This is often necessary when the person who needs to sign the document is unavailable or unable to do so themselves. By using "p. pro.", the person signing the document is indicating that they have the authority to do so on behalf of the absent party.