Here is a case from the Northern District of Texas, Dallas Division, that discusses the voluntary / involuntary rule related to joining adjuster in a lawsuit. This 2020, opinion is styled, Jason Bowers and Casi Bowers v. Chubb Lloyd’s Insurance Company of Texas.
The Bowers who alleged to have suffered hail and wind damage sued their insurer, Chubb, and Chubb’s adjuster Bernard Dang, for denial of the claim.
On July 28, 2019 the Bowers provided the defendants with the pre-suit notice required under Texas Insurance Code, Section 542A.003. Then on October 22, 2019, filed suit in State Court against Chubb and Dang.