There are zippers that cannot be closed like that - the zipper keys lock is fixed on the bag[1]; you can open it with a pen, but you cannot close it again - so you can see that it was tampered with.<p>[1] <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=7t5MPTpy3xU" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=7t5MPTpy3xU</a>