If opposing council issued subpoena requests for financial records and then vacated them citing mediation (that was cancelled by the opposing party 3 days before the date) , can they legally still use the information that was gathered?
Terminology is always important.
The person filing for divorce is called the Petitioner.
The other spouse, who didn't file for divorce, is called the Respondent.
Attorneys aren't engaged in combat, or sport.
If you're the respondent, you refer to the other party's attorney as, petitioner's counsel.
You're involved in litigation, not wrestling, boxing, or any other sport. Litigation isn't combat.
If you filed for divorce you are bringing a lawsuit against your spouse.
In criminal cases the people involved in litigation are called the plaintiff and defendant.
The plaintiff is a branch of government, as in county, township, municipality, state, or federal government.
In civil cases, however, such as dissolution of marriage cases, the people involved are called the petitioner and the respondent.
Someone involved in civil litigation is referred to as a litigant.