To use this ECS card check service simply fill in the information that is displayed on the ECS card you are looking to validate.
The basic check will simply confirm that the details you provide are correct.
However, if the ECS cardholder goes to their MyECS account (either via this website or by using the MyECS smart phone app) they can give you an authorization code that will allow you to lookup the complete card information so you will see a full image of the card you are checking.
Your search results will be displayed at the bottom of this page.