I am sure this has been discussed here in the purseforum before but I could not find the thread - but do you keep the authenticity card in your bag when you take it out? I am scared that if my bag gets stolen (knock on wood!), then they have the authenticity card as well. What I do is that I keep all my authenticity cards in one "card book" (the ones with clear fillers and you can just insert cards in them), and put a label next to the cards to easily identify which bag. Sounds like a lot of work but it is fun actually.
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