I am looking for a way to integrate a campaign registration form on our website, but if a user, that is already a contact registers, it will NOT be created as a new lead, but instead, create a new oppty, that is related to the correct : Account, user and campaign.
Using a web to lead, if you assign the campaign ID, how can you solve, that if the new registrant is already a contact, it will not be created as lead?
Any way to do it?