I have created a webform (Drupal) for people to register for an event. I am trying to avoid creating duplicate individuals if they already exist in Civi when they register, but at the moment whenever there is a registration it always creates a new contact, even if they already exist.
When setting up the webform, in the Civi settings I selected Existing Contact, but kept the Existing Contact component hidden and set to static. I have included First Name, Last Name and Email fields. For the Matching Rule under the contact fields, I have set this to a custom unsupervised rule that just does a check on first name and last name. However, even with all these settings, it is still creating a new contact every time for the event.
Am I misunderstanding the way event registrations work? I want to avoid getting existing contacts to login to Drupal before registering if possible, as I want to keep the form as simple as possible. Would it make a difference if I used a profile form instead?
If I cannot solve this then I guess I can always merge contacts afterwards, but it would be nice if duplicates weren't created in the first place.
I'm using Civi 5.9.0 with Drupal 7.61.
I'm attaching a couple of screenshots of my settings:
Images for the rules settings and the Name Only rule: