Hermesmann v. Seyer (State of Kansas ex rel. Hermesmann v. Seyer, 847 P.2d 1273 (Kan. 1993)), was a precedent-setting Kansas, United States, case in which Colleen Hermesmann successfully argued that a woman is entitled to sue the father of her child for child support even if conception occurred as a result of a criminal act committed by the woman. The case was brought in her name by the then Kansas Department of Social and Rehabilitation Services.