We have discovered an existing Member Account for this email address. The Event Registration form has been populated with your Member Profile. If you prefer to register as a Guest, then use another Email Address: a Guest Account will be automatically created for you, and you will receive email confirmation with details.
Is this what we want to say? If a Member is a Member, why would we be suggesting that they become a Guest?
I was imagining a question: "Is this you?" If yes, then we populate the form for them. I think that's all I had in mind. However, now that we have them...
1. If they are a member registering as a Guest, we could recommend that they register as a Member.
2. If they are a Member whose dues are in arrears, we could recommend that they pay their dues first.
After Registration
1. We could recommend that they update their profile.
2. If Guest, we could recommend that they join.