Definition
Per procuration (Latin: "by proxy" or "through the agency of another") is a phrase used to indicate that a person signing a document does so not in their own right but as an authorized agent acting on behalf of a principal under a specific, limited grant of authority — typically a power of attorney or letter of authority. The term signals that the signature binds the principal, not the agent personally, but only within the scope of the authority conferred.
When a document is signed "per procuration" — commonly abbreviated p.p. or per proc. — it constitutes notice to all parties that the signer's authority is special and constrained. Anyone dealing with such an agent is on constructive notice that the agent cannot exceed that limited mandate. If the agent does act beyond the authority granted, the principal is not bound by the excess.
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Common Language
Modern common usage (Wiktionary): "Per procuration" is defined as a phrase used when signing a letter or document on behalf of another person, typically abbreviated p.p.
Historical common usage (Webster's 1913): Webster's 1913 does not carry a standalone entry for per procuration, reflecting the term's status as legal and commercial Latin rather than ordinary English vocabulary.
The common usage of p.p. on a letter — where a secretary signs on behalf of an executive — captures the surface meaning but obscures the legal weight. In law, per procuration is not merely a courtesy notation; it carries constructive notice consequences. Third parties who ignore the limitation do so at their peril. The common office practice has largely stripped this warning function from the abbreviation.
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Common Confusion
Per procuration is sometimes confused with general agency or ordinary authority to sign. The distinction is material: a general agent may bind the principal across a broad range of acts; an agent signing per procuration signals that authority is specifically limited. Courts have treated the notation as constructive notice of that limitation. Researchers should also distinguish per procuration from procuring cause, a real estate doctrine concerned with which broker earned a commission — an entirely unrelated concept despite the shared Latin root.
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Why It Matters in Research
The phrase is far more common in English and civil law materials than in American sources, as both editions of Black's explicitly note. Researchers working in early American commercial law, bills of exchange, negotiable instruments, or agency doctrine may encounter it in English cases and treatises that were widely cited in 19th-century American courts. The notation carries a specific legal consequence — constructive notice of limited authority — that matters in disputes over whether a principal is bound by an agent's act.
In negotiable instruments research, per procuration signatures on bills of exchange were treated with particular care under English law: a bank or acceptor who paid or accepted a bill bearing a p.p. signature could not claim ignorance of the agent's limited authority. This made the notation a double-edged instrument — it authenticated agency while simultaneously limiting the principal's exposure and warning third parties.
Researchers examining older corporate records, commercial correspondence, or probate materials may find p.p. or per proc. on documents without explanation. Understanding the term prevents misreading the signature as the principal's own act and avoids errors in reconstructing chains of authority.
The term has largely fallen out of American legal practice in favor of explicit agency language ("as attorney-in-fact for," "on behalf of"), but it persists in some formal English commercial instruments and in civil law jurisdictions. When it appears in American sources, it typically arrives through English authority or civilian influence.
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Historical Dictionary Support
Both editions of Black's carry essentially identical entries, reproducing the same quotation — "give notice to all persons that the agent is acting under a special and limited authority" — attributed to 10 C.B. 689. The entry is brief in both editions, consistent with Black's acknowledgment that the phrase is more at home in English and civil law practice than in American usage. Neither edition elaborates on the constructive notice consequences in depth, nor do they address the negotiable instruments context where the doctrine had its sharpest practical application.
The historical dictionaries agree on the core meaning and agree on the abbreviation forms (per proc., p.p.). Neither edition has updated the entry to address the near-disappearance of the phrase from American commercial practice or its survival in particular formal contexts. Researchers should not rely on Black's alone for the negotiable instruments application; English treatises on bills of exchange provide the fuller doctrinal picture.
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Jurisdictional Note
Per procuration carries more doctrinal weight in English law and civil law jurisdictions than in American common law. In the United States, agency authority and its limits are typically expressed through explicit statutory and common law frameworks; the per procuration notation is rarely encountered in modern American instruments. Its significance in any specific jurisdiction depends on whether courts have treated the notation as constructive notice under that jurisdiction's agency or commercial law.
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