Andrew R. Seiler "bookfish"
Arrived in manufacturers packaging so it looked authentic. I was still sceptical based on reviews I read from others on Amazon, so I called thecustomer service phone number for San disk and they verified it was genuine. You will need a magnifying glass ro see the numbers printed on the back of the card, or alternately you can take a photo of it with your smartphone, I used the Galaxy S3 om Macro or text setting and then enlarged the photo to read the numbers.very happy with this card fast response, have hundreds of photos and songs on this card and it works great.