Who can strike out a nurses note?

Just recently I had a note I had written on a patient  striked out without my permission by corporate, It had my name attached to it as though I was the one who did it and done on a day I was not at work. The Directer of Nursing told me because I was the one that originally created the note my name is attached to it.  It was on a patient the state is involved with. Was told I should have documented in another part of chart where state can't see it, only  we can see it.  I was told coorporate has athority to do this.