It's spelled Fortnite and it's a battle to the death to ages 12+
Lovely game for kids.
@k1ooo-slr-sales wrote:
Never ceases to surprise me the number of gamers who have such lax security protocols that they get hacked.
In the online gaming world, anyone who is better than someone else at a game is a hacker.
This (theoretically) means that however may players there are, all but one is a hacker - there are currently 350 million Fortnite players, which means that there are 349, 999,999 hackers just playing Fortnite alone, which in turn suggests the odds of gamers getting hacked is statistically....probable. 
In all seriousness, this is a case of hindsight is 20/20, the seller could have sent the code via message, but to protect themsleves, should have also posted something if there was a postage method listed - if you can establish proof of delivery of the code, you may actually be able to appeal the decision with PayPal, but this is difficult as it sounds like screenshots (of the message sent, any acknowledgement from the buyer of receipt, feedback they left etc), will be all he can supply which doesn't have the greatest chance of being considered water-tight proof.
Your son can also report the incident to ACSC (Australian Cyber Security Centre), however the chances of getting a resolution from this (in the sense of getting the money back) is slim, it is more a way to get the scammers details and methods recorded so that A) if they do it to someone else, the chance of something happening to them increases, and B) the methods used to scam people can be made public knowledge for prevention purposes, as well as potentially assist in the future with developing new laws, regulations and / or guidelines.
It's a bit weird though - when you say the buyer claimed their account was hacked, were they referring to their eBay account or their PayPal account? If the eBay account, then it's not a dispute over payment and PayPal / refunds shouldn't have been involved, but it would if they said their PayPal account was hacked. If they did the latter, can you prove a link between their eBay and PayPal account, that may be of minor help if you appeal (I have had a buyer claim their eBay account was hacked, absolutely nothing happened to the payment i received, though, but I've also had a buyer claim their PayPal account was hacked, and in that case the payment itself was under dispute - this actually happened twice. The first time I had seller protection granted, the second time I was basically able to convince the buyer to close the dispute, so I didn't have to go through any appeals processes).
