I purchased 3 memory cards from eBay and found all to be counterfeited. I performed a memory test and the memory cards failed miserably. eBay has decided in my favor to return all memory cards back to the seller, but I made an appeal that I would rather report this matter to the proper channel. I contacted Samsung at 800-726-7864 and found the company is not proactive in the fight against counterfeiting. A Tech Support person by the name of Gil informed me just to return the item to the seller.