RESUMEN
Stop It Now! aims to prevent child sexual abuse using a free anonymous helpline. It provides information, advice, and guidance to anyone concerned about child sexual abuse. It targets people who have sexually abused children or who are worried that they might do so. This article presents findings from a pilot study on the operation and outcomes of the helplines in the United Kingdom and the Netherlands. The findings underline the strength of the public health approach to prevention efforts. More specifically, benefits reported by helpline users are shown to correspond with the aims of the helplines. A number of factors were reported by users that helped them modify their own or others' actions to minimize risk of abuse. However, a challenge that remains is ensuring that helplines are accessible to those most in need. Recommendations are included to further expand the effect of Stop It Now! in reducing CSA.