Likely completely unrelated but "Frontier Credit, Inc" and "Frontier Credit Card" has quite a few shared characters.
http://www.planetfeedback.com/juniper+bank/staff+attitude/knowledge/customer+service+or+extortion/304355" found an account with this bank on my credit report. I have no knowledge of this account. I called Juniper/Barclays Bank Delaware to clear this up. The representative informed me it was a Frontier Credit Card (of which I still have no knowledge) and that if I payed the annual fee all other charges would be waived. I did not sign up for this account so why would I pay the annual fee to get rid of any other charges"
and google for frontier-credit-inc brings this among few others:
FrontierCreditCard.com Frontier Credit Inc. 6433 Topanga Cyn. #579 Canoga Park, CA 91303 (800)664-6222