If my name is Mary Smith and I'm signing a letter on behalf of John Brown (who has written the letter and whose name is at the bottom), do I sign
Mary Smith pp John Brown
pp John Brown
pp Mary Smith
or something entirely different?
Per procurationem (p.p.): Through the agency (of) — used to indicate that a person is signing a document on behalf of another person (correctly placed before the name of the person signing, but often placed before the name of the person on whose behalf the document is signed, sometimes through incorrect translation of the alternative abbreviation "per pro." as "for and on behalf of").