So I posted about fraud detection before but I keep running into weird things with networks and their numbers. Sometimes I get weird spikes in conversions that just don't make sense like a sudden jump in leads that don't match the traffic source. I'm wondering if anyone here has cracked the code on spotting fake leads or if your network is playing games. Do you guys check the IPs, device info, or use some tools to verify? I feel like some networks might cheat on fraud to keep their numbers looking good but I wanna catch that stuff early before I get burned. Ymmv but what methods work for you guys, especially the sneaky stuff that isn't obvious at first glance.