(1) The division of child support (DCS) mails a debt adjustment notice to the payee under a child support order within thirty days of the date DCS reduces the amount of the support debt it intends to collect if that reduction was due to:

(a) A mathematical error in the debt calculation;

(b) A typographical error in the stated debt;

(c) Proof that DCS should have suspended the support obligation for all or part of the time period involved in the calculation; or

(d) Proof the noncustodial parent (NCP) made payments that DCS had not previously credited against the support debt.

(2) The debt adjustment notice must contain the following information:

(a) The amount of the reduction;

(b) The reason DCS reduced the support debt, as provided under subsection (1) of this section;

(c) The name of the NCP and a statement that the NCP may attend and participate as an independent party in any hearing requested by the payee under this section; and

(d) A statement that DCS continues to provide support enforcement services whether or not the payee objects to the debt adjustment notice.

(3) A debt adjustment notice served in Washington becomes final unless the payee, within twenty days of service of the notice in Washington, files a request with DCS for a hearing under subsection (4) of this section. The effective date of a hearing request is the date DCS receives the request.

(4) A debt adjustment notice served in another state becomes final according to WAC 388-14A-7200.

(5) A hearing under this section is for the limited purpose of determining if DCS correctly reduced the support debt as stated in the notice of debt adjustment.

(6) A payee who requests a late hearing must show good cause for filing a late hearing request if it is filed more than one year after the date of the notice of debt adjustment.