Originally Posted by janetdoe

That's one of the scariest things I've heard on this topic.
OK, that's even scarier. Child support arrears?

Perhaps they were some samples of counterfeit goods that you intended to sell for profit in the USA?

Seriously, I would think that the one valid reason for denying global entry would be a customs violation for smuggling something prohibited into the country. I don't know how an appeal would help unless you were underage and somehow your father told you what to buy but you weren't aware it was illegal. Even that is a huge stretch.