Months before the youngest child’s 18th birthday, a letter is system-generated and sent to both parents at the last address on record informing both parents that the child is turning 18 and contact must be made with the Child Support Agency to confirm the child’s attendance in high school. If no contact is made from either parent, the order ends at the end of the month of the child’s 18th birthday and payments received after that are applied to any unpaid past child support and unpaid court costs and fees. If the Child Support Agency receives a letter on the school’s letterhead confirming that the child is enrolled and pursuing an accredited course of instruction leading to a high school diploma, the order will end at the end of the month on the date that is stated on the letter that the course work was completed or at the end of the month of the date of graduation that is stated on the letter. If the graduation date extends beyond the child’s 19th birthday, child support will end at the end of the month of the child’s 19th birthday. However, payments will not be stopped until all unpaid past child support and unpaid court costs and fees are paid in full per Wisconsin statute.