twish, you mean no? You do it at the airport, just like foreign tourists would do at Changi. Let me confirm with my mum first.
Yeah, even I myself do exchanges at the local Gucci/LV, coz sometimes I can't make up my mind. Of course you can only exchange a brand new product, best is if its within a few days, though they say the max is 1 month.
There are some good guides on spotting fake goods on the net, do a search, there are tons of pointers. But i go on smell alone, coz a real bag that is new would have a very distinctive leather smell, even though it varies between products and brands because of different types used. Have never ever come across any fakes that are able to fake the smell too. But bear in mind it is a new bag, if its been used or display set then probably not. Go to the LV boutique and smell a Tulum/Tikal monogram canvas which has just been released, and then the older stuff like Denim or speedy, of course all the stuff there are authentic, but you will also know that its a pretty brand new bag. If you are buying one and the asst gets from the closet, then of course it has gotta smell new.
Actually don't be surprised that authentic Gucci/LV/Chanel QA is not absolutely top notch. There are some "lemons" around, if you are the super ngeow type who cannot even stand a single 1mm cutting flaw. So they do accept returns.
Charles and Keith do returns too for their shoes, so i guess you can't beat it.
I also have a couple of so-called A-grade bags from Shanghai and South Korea, but those that i've got are not very difficult to see that they are fake up-close. Perhaps mine is not really top-class because they are never above $150 for SK and $80 for Shanghai. But i suppose during peak period a careless employee not following the standard procedures could be duped.