If I change the domain of my White Label Account, will my existing QR Codes still work?
Yes. If you change the production domain in your branding section, all created QR Codes continue to work. Both domains - the old and the new one - will work. However, dynamic QR Codes that are already printed, will contain the old domain, because the shortened URL of a printed QR Code cannot be changed.
You can also setup up a production domain for each user in your white label account. However, once a custom user domain is changed, QR Codes that contain the previous domain for that user will not work anymore.