Amazon Gift Card Scam

I’ve had an email from a Keith Pollard heading ‘How are you and your family’ asking me to buy an Amazon voucher card for him so he can send it to his niece for her birthday. From the USA I guess. Here is his email. I have deleted it! Thank you very much, you can get it from any store around or Walmart store around you Total amount needed to get is £200( £100 denomination) .I need you to scratch the back of the card to reveal the pin, then take a snap shot of the back showing the pin and have them send to me with the receipt of the card here so i can forward them to her.I promise to refund it in full as soon as i return home.

Tim Rothwell