Can the Apple store verify my purchase and warranty by serial number

Question

Can the Apple store verify my purchase and warranty period by serial number ??

Answer 1

Serial number from device could mean it's been sitting in the warehouse for a year before he purchased it can't it?
It could, but all authorized dealers are required to report the sale date and serial number to Apple. That's how Apple knows when a device was sold to set the warranty date; the warranty starts on the day the authorized dealer sells the device to the user, not when the dealer receives the device from Apple.
How would they know his serial number from his device without registering it because I know all the serial numbers show up on my devices but like I said how would the serial number prove that he didn't purchase the device 6 months - 1 year after it left the warehouse or place of purchase.
See my previous response.
Says on website Apple may require a proof of purchase and to keep your receipt.
They may, though usually they don't. But again, the user is not required to register the device with Apple to validate the warranty. In fact, in many countries it is illegal for any manufacturer to require registration before a warranty is honored. The proof of purchase is all that would ever be needed, and again if the device is take directly to Apple that's almost never required.
Regards.