The law says notice is only required for a move of 150 miles or more or out of state. You do not state if the move is out of state. If the move is out of state than 60-days notice is required. You also do not state what the placement schedule is. If the move will make the placement schedule impossible to follow then you need to file a modification of placement motion. Otherwise you can move. I would suggest you also send the notice he refuses to accept via regular mail as well.
The problem will come if he refuses to drive the longer distance. You may want to discuss your situation with an attorney.
This is advice only and not a legal opinion on which action should be taken.