In a response in a fault divorce action, the person who is served with the petition or complaint admits or denies the allegations made by the petitioner or plaintiff and may also make allegations against the petitioner or plaintiff, which is the counterclaim.
Respondents and Defendants must file an answer and counterclaim, usually with 20 days of being served with process. The petitioner or plaintiff, in turn, must file an "answer to counterclaim."
In a no-fault actions, there is no counterclaim and most of the time, if an answer is filed, the respondent or defendant is simply stating he or she agrees with the allegations presented in the Petition or Complaint.