De facto
De facto: Latin for "in fact." Describes something that exists or operates in practice, whether or not it is lawful. The de facto officer doctrine keeps the official acts of a person holding office under color of title valid even if the appointment later proves defective (Ryder v. United States, 515 U.S. 177, 180 (1995)).
What de facto means
In short, de facto is a term you will meet in court papers, rules and legal research. The definition above gives its usual meaning in American civil practice. However, the exact meaning can depend on the rule, statute or court decision that uses it. So it helps to read the term in context.
Where de facto comes up
The term is used across many kinds of cases. For example, you may see it in pleadings, motions and court orders. To see it in context, browse the motions and procedures library or the Learn the Law topics.
Read the source: De jure.
How to research the term
Start with the primary source. For example, if de facto appears in a federal rule, read the rule itself and its official notes. After that, check your court’s local rules and any standing orders from the judge. In addition, search recent decisions from your own state or federal district. They show how courts read de facto in practice. Because state rules often differ, our state procedures guide links to each state’s official rules. Above all, make sure the version you read is still in force.
You can read the current federal court rules online for free.
Related legal terms
- Cross-examination: questioning of a witness by the party who did not call the witness. Under Federal Rule of Evidence 611(b), cross-examination generally should not go beyond the subject matter of the direct examination and matters affecting the witness's credibility.
- Crossclaim: a claim by one party against a coparty, such as one defendant against another.
- CUSIP: a nine-character code that identifies a specific stock, bond or other security in the United States and Canada, used for trading, clearing and settlement. CUSIP numbers are assigned by CUSIP Global Services when a security is issued. They are not assigned to birth certificates, court cases or personal identities.
- Damages: money awarded to compensate for a loss or injury.
Why precise terms matter
Legal words often look like everyday words, but they can carry a precise meaning. Because of that, a small misreading can change how you understand a deadline, a duty or a right. Our glossary keeps each definition short and links it to the procedures where it matters.
Sources
Sources last reviewed: 2026-10-24
Lawtopolis provides legal information and education, not legal advice. Using this site does not create an attorney-client relationship. Laws and court rules vary by jurisdiction and change over time; verify every authority against the official source and consult a licensed attorney in your jurisdiction about your situation.