The Fb email change functionality is depended on the FB webhook, If "Facebook Webhook" is enabled for the business, guests can Update/Modify the email address for the Facebook account.
While you can refer the existing articles on how to change emails while guest is Signed up using FB
How do I modify a guest profile that signed up via Facebook?
Can I update/modify guest's email address if account is connected to Facebook?
Here is some useful information to be kept in mind while changing a email and avoid creation of new account:
- Update/Modify the email address for the Facebook account.
Instead of creating a new FB account for email change for Punchh profile, please be advised to add secondary email to the existing FB profile and make it primary
- The primary Email in Facebook will be the same email address as the primary email of the guest in our Platform
- Once Facebook account's email is updated, guests have to try logging in (Connect via Facebook) with the app again. This will sync and update the email address in the app and the guest's email will be updated successfully.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)