If you get this bill in the mail from “United States Domain Authority”, tear it up and throw it away. It may look official, but I guarantee you it is not. They are attempting to dupe people into renewing a domain name registration through them instead of your actual registrar. They are not your registrar! It is a scam and should be illegal for deceptive practices. If in doubt, contact your web hosting or web design people to verify. But NEVER NEVER NEVER pay a bill just because it looks official and scary. Caveat emptor!
I am a self-employed graphic designer. For more about who I am and what I do, visit my main website at waynehastings.net