мирным путём(if two people or companies reach an agreement out of court, they find a solution to a legal argument without using a court of law: "Banks often opt to settle out of court. CBED Alexander Demidov)
внесудебное разрешение споров(An agreement reached privately by the parties to a lawsuit, settling their grievances and ending the lawsuit without intervention by the court. ELD Alexander Demidov)
досудебное урегулирование споров(an agreement to end a legal argument, in which one side agrees to pay money to the other so that the problem is not brought to court → settle something out of court. LDOCE Alexander Demidov)