Hi, to give an example, lets say the goal is to build loan processing system, where details related to the user is being collected. If the user declares married, then additional form needs to be shown to collect spouse details. However there may be external (to aem forms) events like - User flagged for fraudulent activity (in which case shown a error page and dont take to next form in sequence). This needs to checked with every form submission, before proceeding to next form.- another loan form ...