Legal Question in Criminal Law in North Carolina

If sending 'unwanted mail' were harassment - a lot of advertisers and junk mail business would be shut down! Even if her written note contained language such as 'I never want contact with you again' - it is highly unlikely that a card as you described from you would be considered harassment. Obviously. continued / repeated attempts to contact her after being told not to may constitute harassment. However, one card after 9 months likely would not. However, this is based on the information as you provided it, I find it also highly unlikely that you have not crossed paths with her in this past 9 months since you live in the same apartment building. If there has been contact and it has been of the 'go away and leave me alone' nature - your friend may be right. But its not like you are going to go to prison for it. So unless there is more to the story than you are telling - send the card!