There is no problem regarding lost entry cards, provided that you have been registered with the Feis Office, just arrive on the date and time originally given.  If you did not get your entry card, check if your teacher received it.  If not, contact the Feis Office immediately.  Notice will be given on this website when entry cards have been returned with performance date and time.  General dates are also published well in advance in both the Syllabus and on the website.  Make contact in advance if you have not received notification.