This happened in our court. It was mailed in a box and weighted 80 pounds. I was asked to take them to the bank and cash them. I said nothin doin, and they can ask the judge about it since I refused to take the coins anywhere. He said mail the coins back COD postage, and set him a date in court for review of fines and costs.
If one is a customer at many/most banks, they will auto count coins for deposit and charge nothing. What’s this nothing doing. Sometimes you don’t have to scorch earth.
Mail them to him COD? And if he fails to pay after a certain period of time the post office is required to return them to the sender.