Section 307. Penalties

1.  Any  person  who  shall  wilfully violate any
  provision of this article shall be guilty  of  a  misdemeanor  and  upon
  conviction  shall  be  punished  by  a  fine  not exceeding five hundred
  dollars.
    2. A wilful violation of sections three hundred two or  three  hundred
  three by any person shall bar his recovery of any credit service charge,
  delinquency  or  collection  charge  or refinancing charge on the retail
  instalment contract involved.
    3. Notwithstanding the provisions  of  this  section  any  failure  to
  comply  with  any  provision of this article may be corrected within ten
  days after the holder is notified thereof in writing by the  buyer,  or,
  in  the  absence  of  such  notice, the seller or holder may voluntarily
  correct any such failure to comply and, if  so  corrected,  neither  the
  seller  nor the holder shall be subject to any penalty under subdivision
  two of this section.