there are so many scammers around that bought the item (handbags for instance), they said it is fake- not as describe and want to return for a refund.
of course it will be no problem BUT
they switch their ugly fakes or their old used stuff and said we sent them that
and return that for refund- they get the money- AND THE ITEM
so, people use the tag to attach on the bag. only return if the tag is on- no matter what.
some people just use a piece of paper and tie it on the bag- then buyer said it felt off by itself
so we came up with some other tag - you can search on ebay "security tag" and they will show up-
these tag will have its own number, and they usually are thick plastic- like the cable tie - so buyers have to cut it off. they cant find another one with the same serial number and put it on their fake- KWIM.
some also use the combination lock - you attach it on the item. ONLY give the combination to the buyer when they inspected the bag- inside out- they will email you and said they are happy-
that way, you can prove to ebay/paypal that they are happy.
very sad the world has come to this- but it's true
HTH