We have a couple of features that allow you to remove the survey's Back button to prevent respondents from changing their answers. See our Remove the Back Button and Forward-Only Survey Tutorials to learn more.
These features, however, do not prevent survey respondents from using their browser's back button. We cannot take control of a user's browser, nor would we want to. Controlling a user's browser causes frustration and concerns about security. For this reason, we don't support it.
