Tønder case or Tønder-case (Danish: Tønder-sagen) is a criminal case concerning child sexual abuse in Denmark. The father loaned and rented out his two daughters to a number of different men, who sexually assaulted the girls, who were born in 1994 and 1997 respectively. The case was acted on, on 4 August 2005, when police in Sønderborg received an anonymous tip that later resulted in an investigation on the matter. About three weeks after this tip, the parents were arrested and the girls placed in foster care. While the abuse was happening, the local government received at least 14 different notices about suspicion of child neglect, and the local child authorities held meetings on the matter upwards of 30 times - without doing anything about the matter.