How to Say "under oath" in Spanish
The Spanish word for “under oath” is “jurado” — B1 level. This is a very common word in everyday Spanish.
Examples
Su testimonio es jurado, por lo que debe decir la verdad.
His testimony is sworn, so he must tell the truth.
La declaración jurada debe presentarse mañana.
The sworn statement (affidavit) must be presented tomorrow.
Las palabras fueron juradas ante la corte.
The words were sworn before the court.
Acting as an Adjective
'Jurado' is the form used to describe something that has been sworn or promised. Like any other descriptive word, it must match the thing it describes in gender and number (e.g., 'la declaración jurada', 'los testigos jurados').
Mismatching Gender
Mistake: “La documento jurado.”
Correction: El documento jurado. (Because 'documento' is masculine, 'jurado' must be masculine too.)
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