it's possible, when i was back in Asia couple months ago, one of the show want to test SA and the quality of replica, so they brought around 15 LVs to the store, and ask if the SA can identify what's fake and what's real. Sadly there are only 5 that's auth, but SA-including store manager all agreed there's 7 auth ones......guess those AAA+ replica can really pass the test.
Return w/fake to botique is highly impossilbe, but some Ebay seller did have some horrible scams from buyer return an empty box w/dc, and claimed PayPal for refund b/c they have DC of seller receive 'the item'.