French phrase
J'ai mal noté.
Meaning
I wrote it down wrong.
When to use it
A concise way to report a mistake in a record. It suits work or formal settings and is only mildly apologetic.
Example dialogue
La date limite est le 30 juin ?
The deadline is June 30, right?
J'ai mal noté. C'est le 15 juin.
I wrote it down wrong. It's June 15.