One of the mysteries of the English language finally explained.
With reference to the authorized signing of documents by one person on behalf of another: by the agency of an official agent or attorney, by proxy; by the agency of; also in extended use. Also as adjective Compare "per pro", "procuration".
Early 19th century. In α form from per + procuration. In β form from classical Latin per per + prōcūrātiōnem, accusative of prōcūrātiō. The phrase has not been found in Latin.
per procurationem/pər ˌprɒkjʊreɪtɪˈəʊnɛm//pər ˌprɒkjʊreɪʃɪˈəʊnɛm/
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