Between “attorney at law” and “attorney of law,” only the first is correct. “Attorney at law” is the standard professional designation for a licensed lawyer in the United States; “attorney of law” is not a recognized title in American practice or in any other common law jurisdiction. Using the wrong version on a business card, letterhead, email signature, or court filing signals unfamiliarity with basic legal terminology before anyone reads a word of what follows.
Where “At Law” Comes From
The word “attorney” traces back to the Old French atorné, meaning someone appointed to act for another. In medieval England, an attorney was simply an agent authorized to handle another person’s affairs, and that agent didn’t need to know anything about the law.
The qualifier “at law” was added to mark out attorneys who worked inside the court system. English courts split historically into common law courts, which applied legal rules and precedents, and equity courts, which applied principles of fairness. An attorney at law practiced in the common law courts, preparing cases and managing litigation. The preposition “at” pointed to the setting where the attorney operated, the same way you’d say someone works at a hospital.
American law inherited English common law traditions and kept the phrase, even after the old common law and equity divide faded. “Attorney of law” never emerged as a competing form in any English-speaking legal tradition. That’s the reason it reads as an error rather than a stylistic choice: there is no history behind it and no jurisdiction that uses it.
Why the Qualifier Exists: Attorney at Law vs. Attorney-in-Fact
The “at law” tag isn’t decorative. It exists because there is another kind of attorney the phrase needs to distinguish itself from.
An attorney-in-fact is someone you designate through a power of attorney document to make decisions on your behalf, such as managing bank accounts, signing contracts, or handling real estate transactions. An attorney-in-fact can be a spouse, a sibling, a friend, or anyone else you trust. No law degree, no bar exam, no license.1Legal Information Institute (LII) / Cornell Law School. Attorney-in-Fact
An attorney at law is different in every important way. That person has passed a state bar exam, holds an active license, and is authorized to give legal advice, draft legal documents, and appear in court for a client. An attorney-in-fact cannot do any of those things; their authority is limited to what the power of attorney document specifies, and it ends when the document says it does, when you revoke it, or when you die.1Legal Information Institute (LII) / Cornell Law School. Attorney-in-Fact
Confusing the two causes real problems. Naming someone your “attorney” in a power of attorney doesn’t give them the right to file lawsuits or negotiate legal disputes for you. And hiring an attorney at law doesn’t give that lawyer authority over your finances or medical decisions unless you separately grant it through a power of attorney. The qualifier “at law” is what keeps these two categories from bleeding into each other.
What Happens If You Use “Attorney of Law”
In professional correspondence, the error looks like a spelling mistake on a résumé: minor in isolation, harmful in aggregate. Clients, judges, and other lawyers notice.
In court filings, the stakes rise. Every pleading or motion filed in federal court must be signed by an attorney of record. Federal Rule of Civil Procedure 11 requires the signing attorney to include their name, address, email address, and telephone number.2Cornell Law School. Federal Rules of Civil Procedure Rule 11 The federal rule itself doesn’t require the phrase “Attorney at Law” or even a bar number in the signature block. Those requirements come from local court rules and state procedural codes, and they vary.
In practice, nearly every attorney includes “Attorney at Law” or “Attorney for [Party Name]” in the caption or signature block. It tells the judge, opposing counsel, and court staff at a glance that the signer is a licensed professional authorized to represent a party. Omitting it doesn’t automatically doom a filing, but it stands out.
Filing something signed “Attorney of Law” is worse. A court could read it as a red flag about whether the signer is actually licensed. Under Federal Rule of Civil Procedure 12(f), a court has authority to strike material from a pleading that is immaterial or impertinent.3Legal Information Institute (LII) at Cornell Law School. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections More practically, opposing counsel might use the error to challenge standing or demand verification of bar status. It creates avoidable problems in a setting where precision is the whole point.
The Esquire Alternative
The most common alternative to “Attorney at Law” is “Esquire,” abbreviated “Esq.” The title has an unlikely history, tracing back to the Latin scutarius, or shield-bearer, and it originally referred to young men training as knights in medieval Europe. It later evolved into an honorific for English gentry who ranked above gentlemen but below knights. How it migrated to American lawyers isn’t entirely clear, but by convention “Esquire” in the United States now belongs exclusively to licensed attorneys.
You earn the right to append “Esq.” only after admission to practice in at least one state. A law school graduate who hasn’t passed the bar cannot properly use it. Etiquette also draws a line about who uses it: “Esquire” is generally used by others when referring to you, not by you when introducing yourself in conversation. Writing “Jane Smith, Esq.” on your own letterhead is accepted; announcing yourself in person as “Esquire” is not. And you will never see “Esquire of Law,” which is another sign that legal titles follow fixed conventions rather than interchangeable grammar.
Why Getting the Title Right Matters Ethically
Legal titles are governed by more than custom. The American Bar Association’s Model Rule 7.1 states that a lawyer shall not make a false or misleading communication about the lawyer or the lawyer’s services.4American Bar Association. Rule 7.1 Communications Concerning a Lawyers Services Every state has adopted some version of it. Titles on letterhead, websites, business cards, and advertising all fall under that rule.
Using “Attorney at Law” when you hold an active bar license is accurate and straightforward. Using it without a license, or using a fabricated variant like “Attorney of Law” in a way that implies licensure, is a different matter. For a licensed lawyer, the risk is looking sloppy. For an unlicensed person, it can constitute unauthorized practice of law.
Unauthorized practice of law is governed primarily by state law, and penalties vary widely. In some states it’s a misdemeanor with fines and possible jail time. In others, certain forms can be charged as felonies carrying multi-year prison sentences. Even where it’s treated as a civil matter, courts can issue injunctions, impose fines, and order restitution. Holding yourself out as an attorney by using “Attorney at Law,” “Attorney of Law,” or “Esq.” without a license is one of the fastest ways to trigger those consequences.
The short version: write “Attorney at Law.” It is the correct phrase, it has been the correct phrase for centuries, and the alternative isn’t a variant but a mistake.