Prevent rejected/withdrawn participants to register again

[OmeGak]

Is your feature request related to a problem? Please describe.
After a registration is rejected/withdrawn, the associated user or email address should not be able to register again in the same registration form.

Describe the solution you'd like
The backend should prevent having more than one registration per user in a registration form.

The event registration form view should link to the existing registration, as with approved or pending registrations.

The registration details view should then display a "Your registration has been rejected" message, similar to the pending message.

In case the rejected/withdrawn participant wants to retry, they can contact the conference organizer. Then the conference organizer can reset the rejected registration back to pending.

[pferreir]

I don't have a strong opinion on this since it seems to be a pretty uncommon situation. I think staying in a "rejected" status is fine as long as we clearly show that.

[OmeGak]

Is it so uncommon? To me it seems like the current UX encourages this situation. After a registration has been rejected/withdrawn, the event's main page welcomes the user with:

, which will send them through the registration workflow and result in a new registration. I think this is problematic because I cannot imagine any circumstance where an event organizer is expecting rejected/withdrawn people to register again.

[ThiefMaster]

In case of a withdrawn registration, I'd say it makes much more sense to let the user restore their registration if registering again would still be possible anyway (see #4588).

BTW maybe @pferreir meant is that it's uncommon that someone who was rejected wants to register again?

[pferreir]

BTW maybe @pferreir meant is that it's uncommon that someone who was rejected wants to register again?

Yes, indeed.