constar

To be on record or documented as true ("me consta que lo dijo", I know for a fact he said it) or, with de, to be made up of/consist of ("el libro consta de diez capítulos"). Two distinct, both very common uses worth telling apart early.

• Me consta que llegó a tiempo. — I know for a fact he arrived on time.
• El curso consta de seis módulos. — The course consists of six modules.
• Que conste que yo no dije eso. — Let it be on record that I didn't say that.

Confused with constatar — constar is about something already being true/on record ("me consta que..."), while constatar is the active act of verifying or establishing that fact yourself.

Often confused with constatar.

• expression "Que conste" — A genuine, widely used fixed expression built directly on constar, meaning "let the record show" or "for the record" — used to emphasize that a statement should be clearly understood or remembered, e.g. "yo estaba en contra, que conste."