Abstract The present investigation is a conversation-analytic study that examines a particular type of informing sequence where the new information is received with a turn displaying ritualized disbelief. In this paper, I analyze a range of ritualized disbelief and news-confirmation turn designs in Mexican Spanish talk: I describe the trajectory that different ritualized disbeliefs have, the composition of the disbelief they display, and how news-producers deal with ritualized disbelief turns. I argue that a speaker’s knowledge about the matter at hand relates to the type of disbelief expressed in his or her disbelieving turn; that is, the social actions involved in this type of sequences show a relationship between turn design, epistemics and disbelief.