Where there is fun to be had and money to be spent, there is often a scammer waiting around the corner.

The Better Business Bureau is warning concert-goers of scams. Tuesday’s Ariana Grande concert in Pittsburgh saw tech-savvy scammers net themselves thousands of dollars from unsuspecting fans. While it is normal to be passionate about your favorite singer, unfortunately you still need to think carefully before spending a large amount of money on tickets, as several Ariana Grande fans recently found out. Scammers play on people’s FOMO (fear of missing out) and rely on individuals being to excited/rushed to verify whether or not they’re getting the real deal.

If you go outside of a venue looking for scalpers, you will inevitably run into trouble at some point. Now, however, scammers are putting technology to use in order to hide their tracks after the act. Some of the most important red flags include the price of the “ticket.” If you see a ticket advertised on Craigslist or elsewhere, and it’s significantly cheaper than the venue’s ticket prices, then that’s a serious red flag. In this case, Ticket Master often finds that the tickets the scammers sold were paid for with a stolen credit card, ending any possibility for a refund.

The Better Business Bureau crowd-sources scams through their “scamtracker,” which is how they can also find the victims of scams. If you know of a scam of any kind, you can report it to the Better Business Bureau and perhaps save someone from that scam. When it comes to tickets, always get them at the source, or you risk losing a lot of money.