commissioner koskinen thinks its an invitation to commit fraud. >> koskinen: the prepaid cards are the currency of criminals. our problem is you can't distinguish the number of a prepaid card from a legitimate bank account. >> kroft: almost impossible to trace, right? >> koskinen: it is almost impossible to trace. >> kroft: why doesn't somebody put an end to that? >> koskinen: there are significant percentages of the population that were unbanked, as it were called. if you don't allow them to use a prepaid card, they are going to have to get a check and they'll have to pay someone a lot of money to cash that check. so you are disadvantaging a significant amount of the population. >> kroft: and empowering a criminal network? >> koskinen: and you are empowering a criminal network. >> kroft: five years into the scam, most of the time the i.r.s. still cannot not tell if the person filing the return and claiming the refund is actually the real taxpayer. by comparison the credit card companies are much better at flagging suspicious charges before they are paid out. credit card companies don'

jim jordan is calling irs commissioner john koskinen to testify september 17 about the recorded exchange server drives which may not have been destroyed due to budgetary constraints. as of friday, the irs says additional employees, including processing agents, technical advisor to lois lerner, tax law specialist and group specialist experienced lost e-mails. house oversight committee chairman darrell issa reacting to the news, saying in part, quote, the irs's ever changing story is practically impossible to follow at this point as they modify it each time to accommodate new facts. this pattern must stop. the irs shooting back to critics saying in part, the irs has found no evidence that any irs personnel deliberately destroyed any evidence. to the contrary, the computer issues identified appear to be the same sorts of issues routinely experienced by employees within the irs. jordan says there are 760 exchange server tapes that could be potential sources for the destroyed e-mails sent or received by lois lerner. arthel, back to you. >> okay. thank you. >>> family and friends are getting r