Hello,

Thanks for reaching out to us. By default, Amelia "stores" each customer in Amelia Customer section, including the email address, however, it's not automatically assigned to WP user. There are two options - Check customer's name for existing email/phone when booking and "Automatically create Amelia Customer user"

If the "Check customer's name for existing email/phone when booking" option is enabled, already registered customers will need to use the same name, email, or phone number as previously registered when making a booking.

The other option will tell Amelia to automatically create a new WP user for each new customer and assign it to the same WP user.

If none of these is turned on, then the customer can book multiple appointments with the same email but under a different name or last name. 

Hello, 

Well, you can certainly add the email verification (with custom script), however, with the option enabled, they would need to use the same first and last name anyway. Of course, if their information is already registered. Amelia by default will associate the email notifications with the email address of the customer who initially booked, but each customer must have a different email address. 

May i close this ticket if you don't have any other questions?