Okay i'm not entirely sure what you mean here, two things i'm thinking, so one of these: Does clickbank show the email of a publisher? Nope, I don't think so, but you can always try to whois their domain to check for it in public contact records, however big publishers will have privacy registration. Does clickbank email publishers every time their product sells? I believe so, yep. Maybe you ment one of those? Or the only other thing i'm thinking is, if someone emails clickbank about a product for example "I want a refund on ***" or "*** is a ridiculous scam" does clickbank show them these emails? I don't know the answer to that one.