Buy it from an official local apple shop as they will give you the bill of the purchase that you have bought it officially. I had ordered two apple care warranty packs from ebay for me and my friend my warranty could not be extended while my friend's warranty was extended. I had called up apple and then they told me to give a bill for the apple care which i did not have, but i told them it was a gift still nothing could be done.
So long story short, buy it locally and officially i recently purchased for my MacBook Pro'13,it cost me around Rs.13470. Don't go to save a few extra bucks and buy from amazon or ebay.