I got a letter addressed to my corporation a couple of weeks ago. It looked like a very official California state government form entitled Annual Minutes Disclosure Statement CA-FORM AMDS-03. It requested to be completed and sent back in along with $150 and a copy of my annual minutes. I started to fill it all out, but I became suspicious. Sure enough, it's not something actually required by California. It's just a company that charges you $150 to keep a copy of your minutes on file (something you can of course do yourself).
Be aware, the address for the company is:
California Corporate Headquarters
2443 Fair Oaks Boulevard #539
Sacramento, CA 95825