If there is a case where your refund must be processed via bank transfer (e.g., due to an unsuccessful refund to the original payment method), FIFA Ticketing will contact you via email from no-reply.fwc26@tickets.fifa.org or noreply@tickets.fifa.org with further steps on how to enter your bank details via a dedicated refund portal.
You can verify that any emails you receive from FIFA Ticketing regarding this matter are legitimate by confirming that they come from the email addresses listed above.