Dealing with first return
So I sold an opened box phone which has never been activated and it was delivered last week Wednesday. On Sunday, the buyer messaged me that I should send a charger as the charger they had was slow charging the phone. I made them aware phones don't come bundled with chargers but as a gesture of good will I can either send them a brand new spare charger I had or refund them £10 to buy a charger. Was waiting for their response until I got an email from eBay that they have opened INAD with a claim that the phone goes blank when they receive a phone call.
Deep down I know this is just buyer's remorse given that they didn't have the decency to message me about this "issue". I have already accepted the return but my issue now is the fear of fraudulent return by them. How do I protect myself from possible label tampering?