The abbreviation "pp" used when signing a letter stands for "per procurationem." This indicates that someone is signing on behalf of another person. The abbreviation is derived from the Latin word "procurare," which means "to take care of."
The use of "pp" is a common practice in the business world when people are unable to sign letters themselves because they are otherwise occupied. In addition, real estate agents, investment brokers or lenders sometimes sign for others. However, an individual must be authorized to use "pp." For instance, when an assistant signs a letter for a manager who is on a business trip, the letters "pp" are placed just before the signature of the person who actually signs. The name of the person who should have signed the letter is printed just above or below the authorized signature.