It's a very confidential matter, and I don't want anyone else to know about the meeting.
What I am about to tell you is a confidential matter.
There are some confidential matters that I'll want to bring up.
A bank's losses are a confidential matter that only the bank knows.
I understand it is a confidential matter relating to a serious crime.
I told her it was a confidential matter, that we could explain when she arrived.
Third, the existence of this survey is a highly confidential matter.
I want to point out in advance that it concerns no confidential matters of our city's.
"I wouldn't expect our strategy and confidential matters to be brought into those companies," he said.
Sorry, can't tell you that because it's a confidential matter.