Section 714. Automatic refund of credit balances

Where a credit balance
  greater than one dollar exists, and  where  no  purchases,  payments  or
  other  transactions (other than the imposition of service, membership or
  other administrative charges) occur with respect to  a  consumer  credit
  account  for  six  consecutive billing cycles, the creditor shall refund
  the full amount of such credit balance by cash or  check  within  thirty
  days after the end of such period of inactivity.