I had similar experience. I bought a coach bag from the outlet in US. And every time I pass through different stores exit the security sounds. At first I don't know why it happens. There is no big security tag in the bag. But it's so annoying that every time the alarm sounds and the sales there give u a suspicious look. So I finally search my bag and there is a small tag (like a sticker) inside. Seems they forgot to take it out. So after I throw it away, no problem at all.