put someone on notice

And social work has been put on notice not to take its eye off the ball.

That said, I want to put you on notice now.

Some thought it was time to put the Americans on notice that they should leave.

And the doctors have been put on notice that they must be available.

"I think he just wants to put us on notice that it can't happen soon."

I only know that we have now been put on notice.

And back here, the outside world, the system, was put on notice.

"I wanted to put the government and the world on notice," he said.

The officers running the war in Iraq were put on notice.

Let me take a moment to put our opponents on notice.