Thursday Morning Riddle

I’m a warning that’s given so one may prepare;
I’m a sign that you post when you need to declare;
I’m to casually see, thus becoming aware;
And I’m word to your boss you’ll no longer be there.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

3 Responses to “Thursday Morning Riddle”

  1. Asher Says:

    Notice

  2. Bill Says:

    NOTICE is correct. Way to go, Asher!

  3. Asher Says:

    This was a good one, Bill…and thanks for deleting my duplicate response…sorry ’bout that.

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