You shouldn't be able to Not proceed a case so easily, human error dictates this is sometimes done in error and there is no going back. These cases should have the ability to be reopened (even if an explanation is needed). causes so much work to rekey and sort other stuff in the background - clients sometimes change their mind and if they come back we can't reopen cases

In addition there should be are you sure you want to close this case Yes/ No options as at the moment there is no fail safe.