I have been using this for some time now! if you buy of reputable sellers this method is super easy.
It is not reporting the item as counterfeit, the seller leaves you negatives feedback and they also make it so annoying to get a refund let alone another item!
This method is simple and effective. (specially for clothing/shoes)
I have only tried on items under $100. Could work on higher items depending on the product you have bought.
Method:
EASY DOUBLE DIP