Kinguin has set up what’s known as their “Buyer Protection Program” (BPP) which offers you a safety net if there’s anything wrong with the product keys or codes. It’s pretty much the same model we see at other major online marketplaces like eBay - and it allows you to make purchases in full confidence that you’ll actually receive the product you pay for!
The site also uses state-of-the-art encryption software to ensure that, when you’re making a payment, your sensitive information is secure. What’s more, buyers don’t find our your payment details or your email address as this is all handled automatically by Kinguin - so there is very little risk. If you do run into any problems, Kinguin appears to act fast - and while it’s hard to find any stories of people buying invalid codes, there are a few - and they state that the Kinguin team were very quick to sort out the issue and rectify it, issuing a refund.