Nevada has the highest credit card delinquency rate in the nation. More than one in every hundred Nevadan credit card holders are not paying the bills, according to Transunion, the Chicago-based company that tracks credit card data. But many of the banks that issue cards cannot prove the debt and that promises to be the next big wave of consumer discontent. Much like robo-signing, the many lawsuits against consumers may prove problematic because the company that owns the debt cannot prove its debt. We talk about how that happens and what consumers can do if they're threatened by collection agencies and believe the debt is an error.