My Ex Owes Back Child Support And More

My ex owes back child support (somewhere around the amount of $40,000) from a previous marriage. I am trying to sell my house and his property (I have title on the house and he has title on the property). Can Oregon place a lien on this property? If I sell these two combined am I liable for any of his debt. Yes he would get 1/2 of the proceeds if I was to get place sold. This is in the state of Nevada. Oregon is the state that has the past child support claim.