On the Convention website at http://convention.viettesol.org, when you submit a form and receive an error message as in the image below, it means that you ALREADY have an account on this system. Please log in the system using the email account and the password you created or generated by the system, then go to the form you need to complete.
You are encouraged to use only one email address on the system so that you can access to everything you have created in or submitted to the system in one place. DO NOT complete the form with a different email as you will be creating two accounts for you on the system. Please ignore the misleading instruction "Please use a different email address!" from the system.