Here's one I haven't seen before - designed to cause fear and anxiety in the vulnerable/gullible:

Notice to Appear,

The copy of the court notice is attached to this letter. Please, read it thoroughly.
Note: If you do not attend the hearing the judge may hear the case in your absence.
Truly yours,
Clerk to the Court,
Lily Smith

The email it comes from claims to be customer support @familylawyersoforangecounty