Court is attaching the property of my in laws without hearing their side of the story

Seeking an answer on behalf of my inlaws. So my brother in law and his wife have been married for almost 15 years (settled in Bangalore). They have had issues for a long time. 2 years ago she convinced my brother in law that it was best if she took a break and shifted to her parents place in Kerala. His wife and her parents expected that my brother in law would drop everything in Bangalore and would move in with them as he wouldnt be able to survive without the kids. Fast forward to 2 years she has gone ahead and filed a case in Kerala asking for damages worth 1 Cr and has named my brother in law, and both his parents as respondents. Their prayer ranges from taking away her gold, to dowry, loans taken from her father and domestic violence to kick her out of the house. I don't intend to get into the merits of these points but rather would like to understand the below: The notice was received via post 2 days after the court date and the next court date is fixed after a month. But during the first hearing itself, the court has issued a notice to attach my father in laws property as the court as it was convinced that they might sell off the property. And some clerk from the court showed up to serve the notice. (One small twist - the clerk showed up with the wifes father in his car and knowing very well that my in laws were not in residence, trespassed through the back gate to drop the notice on the porch. The clerk also called my mother in law to intimidate that she was there to execute a japthi notice. They interacted with the neighbors to spread the word about the case). So below are my questions: 1. Is it normal for the court to issue said attachment of property without hearing our side? 2. Can we get this vacated if we approach the highcourt? and should we do that ? 3. We strongly believe that the court clerk was influenced into making that call. Is there a way to make her life difficult?