Why do you even want to know this? If your EC's are legit, then there's nothing to worry about; if you faked them, then I'm certainly not going to tell you how to avoid detection. In either case, it's moot. I don't know what you're looking for here. Besides, only people associated with admissions would know this, and I seriously doubt they would tell you their methodology for sniffing out cheaters.
Respect my Authoritaaah!