Verification Process for Extracurriculars?

I've always wondered, do colleges actually verify all the extracurriculars we list on our applications? I know honesty is key, but what's stopping students from exaggerating or fibbing a bit?

Colleges expect honesty on applications, but they aren't naive. It's understood that some embellishment might occur. That said, many applications undergo random verification checks. If something stands out or seems inconsistent with the rest of an application, an admissions officer might follow up with a phone call to your school or the organization you're claiming to have been involved with. For example, if a student claims to have founded a successful nonprofit but there's little online presence or mention of it in recommendation letters, that might raise a flag.