My elderly mom received these in the mail recently. They deliberately look official, but are scams. The documents imply that you need a copy of your deed, and for about $90 they will send you one. The problem is that you can get a copy of your deed directly from the County Recorder for $3.
There is probably nothing illegal about these scams. They provide a service (not really necessary) for a fee (massively inflated). But it’s a deliberate deception aimed at the elderly for profit. Look how official these documents appear:
If you read them carefully, you can easily conclude the “service” is not official. But evidently enough people are fooled by this deception that these mass mailings are profitable. Please be aware and informed, and watch out for the wolves that prey upon those least able to protect themselves.