What counts as a Proof of Purchase?

[AmbiguousNinja]

I bought a Macbook Pro and now i need a "proof of purchase." What counts as one? Anything on the box like a serial number or a reciept? Thanks in advance!

 

[GoCubsGo]

A receipt? Who needs to see this?

 

[simsaladimbamba]

Receipt + serial number.
Does it pertain to this?
Lion Up-To-Date program

 

[AmbiguousNinja]

Receipt + serial number.
Does it pertain to this?
Lion Up-To-Date program

Actually Yes! I don't have a credit card so I can't use the first option but I do have all the original receipts and the serial so I was just wondering if there were any other proof of purchases that I need.