Do you get a letter if denied?

[freestate]

If you pass the background but fail the poly and, I assume, are denied a clearance. . . do you get some sort of written notification of such?  Or does your clearance officer at your employment just orally tell you?

Are you REQUIRED TO GET WRITTEN NOTICE OF DENIAL?

[Indiana73]

Depends on the agency...in my experience, I was told it "looked good but they had to send it to HQ" for the FBI three years ago, only to be called a week later and told "nope, sorry."  My current job they told me I was good before I left the chair.