US Domain Authority or United States Domain Authority located at usdomainauthority.com is attempting to collect a fake domain renewal via a deceptive scheme. This deceptive scheme has been around for ages and even after repeated reports against websites like US Domain Authority that have deceived people with the BBB, the Attorney General's office, the FCC, etc, somehow they are still in operation. All the website operators do is change their names.
The US Domain Authority Letter
US Domain Authority
PO Box 2363
Hendersonville, NC 28793
How US Domain Authority Operates
This US Domain Authority sends "renewal" notices (via U.S. mail) to people who are not their customers. They get the expiration dates correct (which can be found with a simple search) so it looks legitimate. They also use important-looking stationary with American flags and official but vague language implying that you are already a customer. Even the company's name implies that they are somehow the official gatekeeper of domain names in the U.S.
Some inexperienced website owners sometimes end up filling out the paperwork, sending in their credit card numbers, and inadvertently transferring their domain name to US Domain Authority. This usually means they end up paying a higher fee for the domain name.
Is what they are doing illegal? I don't think so, although numerous lawsuits have surfaced over this tactic. However, it is obviously unethical and deceptive. So if you receive a "renewal" notice from US Domain Authority, do not send it in.
A website called Domain Registry of America a few years ago ran a similar deceptive scheme.