Hello but issuing a WARNING

That's ludicrous! I'd blitz social media to make sure everybody knows, maybe someone representing the band will see and do something.
I transferred ID when I sold a Wembley ticket using the venue's app.

PayPal may help you retrieve the money, but then the buyer loses out ....

I don't know, but when I sold the ticket, I used the "transfer" option on the app so the ticket would be registered to the person I sold it to.

I know someone selling a seat for the last night .... 

You could accidentally break the seat .... 

With mixed feelings I have to add that similar issues are reported at Ticketswap. Moreover, lots of buyers complain that their ticket seems already scanned at the entry, due to incomplete or missing control on duplicates being uploaded and sold via the site. It is only after I bought a ticket for the upcoming Cure show in Antwerp that I found out about all this on TrustPilot...

Anyway, I'll let the Universe decide on the outcome next Wednesday. Fortunately things can never go wrong: In the best case scenario, I will meet interesting people while waiting for a couple of hours outside in the pouring rain (at 6°C and 3 Beaufort as predicted), worrying about me not being allowed to enter the venue, after having heard the soundcheck for Like Cockatoos and The Kiss, then suddenly finding myself in front of the stage, first row, next to a Mexican superfan who is so kind to sign my new socks of The Cure, while thinking about the concert review I will write for TCC and how good I will look in my brand new The Cure hoodie (size M, greyish logo) when recommending everyone to put at least some trust in TicketSwap, regardless of what goes around. In the worst case scenario, I will meet interesting people while waiting for a couple of hours outside in the pouring rain (at 6°C and 3 Beaufort as predicted), worrying about me not being allowed to enter the venue, after having heard the soundcheck for Like Cockatoos and The Kiss, then suddenly finding myself all Alone in a gutter, thirsty and hungry... BUT proudly patting myself on my own shoulder (since there was no one else there, they are inside the venue by now) for being proven right about my dubious ticket, while putting myself on the same well-respected level as a Mexican fan that was misinformed by Perry's wife about entry to the venue, while thinking about the public transport review I will write for TCC and the Cure songs I will listen to when crawling back home, looking forward to my brand new The Cure hoodie (size M, greyish logo) that some stranger I met while waiting for hours in the pouring rain (etc. etc.) promised me to buy, since I look like someone that can be trusted and that would, as promised, wire the money on his/her account as soon as he/she texted me the hoodie was taken care of, while considering applying for a job at TicketSwap as Chief Ticket Swapper, ready to swap all fakers with honest people that (at least) can name all The Cure albums in backwards chronological order.

Bottom line: life is too short to not hold on to The Cure.   

Well, what else is left... but faith ;-)