My first question is when a subpoena is served by the DA of one state on a resident of CA how does the subpoena need to be served (e.g. mail, in person)? This is a subpoena that is going to be served on me (in CA) from another state. This state wants my testimony in a criminal matter. I am disabled and cannot travel to another state. Once served in CA can I go before a local judge to prove undue hardship (e.g. letters from physicians)? Also note this is a death penalty trial and the state serving the subpoena does not have any type of witness protection and I also can't remember much regarding the event.Concerning the first question....do they have to serve me in person or can they simply have the subpoena left with someone else? Thanks for everyone's helpful response(s). Wow...seems as though witness(s) do not have any protections (unless one is the victim of a sexual crime)., but criminal defendants have loads of rights.