Hello. I recently bought two identical Freesat boxes, one from Amazon and one from eBay. One was supposed to be a present for my parents but they decided to renew their Sky, so I need to send the Amazon one back (will be free return vs paid return with eBay). However, now that I've taken the boxes out they have mingled and I don't know which one came from Amazon! Can I send either back? Or will they scan and realise the serial number is different (in 50/50 chance I send back wrong one)? I messaged the eBay seller to ask if he knew the serial of the one he sent but unfortunately did not.