The traditional way to use pp when signing a letter on someone else’s behalf is to place pp before one’s own name rather than before the name of the other person. This is because the original Latin phrase per procurationem means ‘through the agency of’. However, pp is now often taken to mean ‘on behalf of’ and is placed before the name of the person who has not signed, and this has become standard practice in many offices.
Definition of pp in:
- The US English dictionary