Hi,
Thanks for your response.
Guest purchases are NOT allowed.
So when access to a course is purchased via Woocommerce, a WordPress account is created, and certain information collected at the checkout is used to create a matching account in Moodle (hosted elsewhere) using a WP plugin called Edwiser Bridge.
So are you saying that you were NOT able to create a WP account using an existing email address through Woocommerce?
Maybe Edwiser Bridge is stuffing things up…