ex parte divorce

Divorce decree passed in the absence of the respondent is ex parte decree i.e., when the respondent had not filed his appearance in the court to contest the case.

agree with expert, nothing left to add

Ex-parte is an expression used to signify smething done or said by one person not in the presence of his opponent.  This term is applied in law to a proceeding by one party in the absence of, and without notice to, the other.  On or from one side only.  Ex-parte proceeding  at the instance and for the benefit of one party only and without notice or contestation by any person adversely interested.