Are you talking about the small pierrot seal on 
the bottom right hand corner? The little mark and 
words on the bottom? The little sticker? I think 
maybe that is what she is talking about.

If that is, it's just a Pierrot seal. You do not 
want to remove it maybe until you know more about 
it. Someone else can better explain what that is.

If that's not it, then dunno what mark ya talking 
about. Gomen!