It’s novel to get the snail mail equivalent of spam. This one came via U.S. mail from the Fictitious Business Name Renewal Center in Sacramento, CA. My business is required to register and publish a Fictitious Business Name (FBN, aka DBA or Doing Business As) every 5 years. And every 5 years I get an official-looking form from this organization telling me that “California Law Requires You To Renew Your Fictitious Business Name…”. In fine print, at the end of a paragraph of fine print, it says “This is not a bill. This is a solicitation. You are under no obligation to pay the amount stated, unless you accept this offer.”
If you run a web search on the name of this organization you’ll see lots of posts with words like “ripoff” and “scam”. Some are from people who paid the fee (it used to be $100, now it’s $150) and in exchange received the freely available form and instructions about how to renew your FBN. Caveat emptor.