A more thorough explanation:

Definition: In historical ecclesiastical law, a producent (pronounced pruh-doo-suhnt) is the person who calls a witness to testify in a legal proceeding.

For example, in a church court case, the producent would be the person who initiates the legal action and calls upon witnesses to provide evidence to support their case. The producent would be responsible for presenting their case and questioning the witnesses they have called.

Another example would be in a civil court case, where the plaintiff would be the producent, as they are the one bringing the case to court and calling witnesses to testify on their behalf.

These examples illustrate how the producent is the party who initiates legal action and is responsible for calling witnesses to provide evidence to support their case.