By proxy; by one acting as an agent with special powers; as under a letter of attorney. These words “give notice to all persons that the agent is acting under a special and limited authority.” 10 C. B. 689. The phrase is commonly ab-breviated to “per proc.,” or “p. p.,” and is more used in the civil law and in England than in American law
Source: Black’s Law Dictionary 2nd Ed (1910)
