Requires write_assigned_fulfillment_orders access scope, write_merchant_managed_fulfillment_orders access scope or write_third_party_fulfillment_orders access scope. Also: The user must have fulfill_and_ship_orders permission.
Whether the customer will be notified of this update and future updates for the fulfillment.
If this field is left blank, then notifications won't be sent to the customer when the fulfillment is updated.