When public registration is enabled, participants receive an invitation email containing a tokenized response URL after registering their email address. If this email is lost for any reason, there is currently no way for the user to retrieve the response URL by themselves.

Even if the user attempts to register again with the same email address on the registration page, no email is resent because the address has already been registered. This behavior is also documented in the manual.

However, under the current behavior, a participant who registered their email address but later deleted the invitation email may no longer be able to respond. No new email is sent, and the screen does not indicate that the address has already been registered.

Therefore, it may be preferable that when the same email address is entered again, the system resends the exact same email that was originally sent at the time of first registration. Alternatively, the page could display a message such as “already registered,” together with a way to contact the administrator or a “resend” button, so that participants have some self-service method to recover the original invitation email.