Hello, My uncle lives in the US and he bought me a Macbook Pro from the BestBuy store. he came to Israel, where I live, and gave it to me. Now I know there's worldwide warranty for Apple products , and I was wondering if I need the receipt of the Macbook Pro? or is it just enough to give them the Product Serial Number so they can check it online and see if I do have warranty or not... Thank you very much!