Definitions for "Accessorial"
something added that is nonessential but helpful; "accessorial services included sorting and packing"
Standard procedure for LTL and FTL shipping includes a truck driver backing up to a dock to be loaded by the consignor (shipper), and driving the cargo to the receiving destination to be unloaded by the consignee. Any service that is not considered "standard procedure" will require additional fees and is referred to as an accessorial service or fee. These are all examples of accessorial services: Hazardous materials Inside delivery Liftgate service Fuel Surcharge Arrival notification Insurance COD Residential Pickup or Delivery
Charges: A rate or charge stated in carrier tariff for extra services that is in addition to the linehaul rate.
Keywords:  guilt, pertaining, agency
Of or pertaining to an accessory; as, accessorial agency, accessorial guilt.