If you received an email from Apple Developer like the one below this is due to some guests who have signed up using Apple ID and the "Hide My Email" option not receiving emails.
Please submit a Punchh Support ticket if you receive this so we can check that the the emails are not being bounced and look into any changes that may be needed in your Apple Developer account.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)