When you receive the item, get it properly checked to see if it is an authentic item.
If found to be fake, do not worry under eBay's 30 day MBG, Money back Guarantee you would receive a full refund, you would just need to proceed this way.
Go right of the item in your Purchase History and from More Actions select... Return this item selecting the reason Item Does Not Match Description or Photos.
The seller needs to accept this case within 3 days and refund, if they want their item back first , they need to pay for that fully tracked return postage, then on receipt of their item they have 48 hours to refund you. If they don't , need to escalate the case, ask eBay to step in, and they'll force the refund.
Never listen to any excuse or promise from the seller to close the case early, and do not forget to escalate.
Hopefully, you will not receive a fake item, and you're worrying too soon, but keep the above instructions, just in case the item received, is not as described.
@maridaup
