Definitely tell them! I just went through a situation exactly like yours in April. They will find out, whether it is from you, or the quarterly notification from the bon which is emailed to all facilities. It looks better coming from you, i promise! I told my manager what happened and that i didn't want her to feel there were trust issues. She was wonderful, and even offered to be a superior reference if i ever needed her. If she had found out herself, i don't think she would have been so open about it. Honesty is best when approaching your reprimand because they will find out, there is no hiding it from anyone in healthcare... Good luck and keep your head up, cause you are going to have ups and downs.