Subpoena of a witness

#1

If plantiff and defendent want to subpoena the same person to testify in court do we both submit a subpoena?
I am aware that my ex already sent a subpoena to someone I want to use but wondering if I should also send one b/c couldn’t they dismiss them having to come for their subpoena. I want to make sure they come for my questioning.

#2

Yes, the person issuing the subpoena has the right to release someone from their subpoena, so if you feel this may happen, it would be best to also issue them a subpoena.

#3

What is the difference of issuing a subpoena of a witness versus an getting an affidavit?

#4

A court doesn’t have to accept an affidavit into evidence.