diplomacy_foreign_1150_failed_county_switch_effect

diplomacy_foreign_1150_failed_county_switch_effect = {
	# Add xp
	scope:ruler = { add_diplomacy_lifestyle_xp = miniscule_lifestyle_experience }
	# Add negative opinion (both neighbor and possible vassal)
	scope:neighbor = {
		add_opinion = {
			modifier = respect_opinion
			target = scope:ruler
			opinion = low_negative_opinion
		}
	}
	if = {
		limit = {
			exists = scope:neighbor_vassal
		}
		scope:neighbor_vassal = {
			add_opinion = {
				modifier = respect_opinion
				target = scope:ruler
				opinion = medium_negative_opinion
			}
		}
	}
	# Reduce control in your county (...sell-out)
	scope:neighbor_county = {
		change_county_control = major_county_control_loss
	}
}

As written in game/common/scripted_effects/00_diplomacy_lifestyle_effects.txt.