(1)    In an open-end credit plan in which more than one person may be obligated for extensions of credit, any person may terminate his or her liability for future extensions of credit under the plan by giving written notice to the creditor of the person’s termination of liability. The person’s liability for future extensions of credit under the plan shall continue as to loans extended to, or purchases made by, any other person under the plan for 15 business days after the creditor’s receipt of the termination notice. The terminating person’s liability may not exceed the greater of the requested and contracted for credit limit under the plan or the balance outstanding under the plan on the receipt of the termination notice plus $500.

   (2)   Notwithstanding sub. (1), a person remains liable for loans extended to, or purchases made by, the person after giving the termination notice.