No retail seller under a retail installment contract, executed in this State, shall sell, transfer or assign the obligation represented by such contract or any evidence of indebtedness thereunder to any person who is not authorized as a sales finance company pursuant to the provisions of this act, except that such obligation or evidence of indebtedness may be sold, transferred or assigned to a State or national bank outside of this State if the retail installment contract is retained by the retail seller or sales finance company and collection of payments thereon is made to the retail seller or sales finance company.
N.J.S. § 17:16C-45