Forgery

Gannon is in 1st grade.  Each day they get a color: Apple stamp for EXCELLENT, Green for good, Yellow for had some problems, Blue for really not so good, and Red for WOW, you had to work at being that difficult!  The calendar is to be initialed daily by a parent so that parents  Today, Gannon came home with a green.  As parents, we were of course, pleased.  Gordon went to sign it for the day, but oddly, the folder was already signed with a VERY close replica of his signature.  I was questioned first, but I quickly pointed out that as one of his parents, I would probably have signed my OWN name.  We went to the next most probable source.
"Yup.  I did that.  It looks JUST like daddys!"

So, forgery, A+...we just need to work on an alibi.