Please think the Kendo UI validation farmework not only in terms of client-side validation but also in terms of reporting server-side errors. A framework that would only provide a way to display a validation error message based on a client-side rule after each related input field would not be very helpful in my opinion. All errors need to be reported in a consistent way. My preferred option is: - a message box at the top of a form to display all messages including OK messages and error messages (client-side and server-side). - higlighted fields with tooltips (not to clutter the form layout) to repeat error messages in context when applicable. Although the framework built into Kendo UI might only provide client-side validation, please make sure to provide entry points into the UI used to report errors. Alternatively, leave the UI to the developer and provide a simple way to collect all validation error messages on a form.