A lumper is someone who is hired to load or unload cargo from a truck particularly in a cold storage warehouse receiving refrigerated goods that may require special handling and sorting. Lumpers are usually third-party or independent contractors. Typically, they are paid by the truck driver or the company that owns the truck. Depending on the situation, lumpers may be paid an hourly rate or a flat fee. In some cases, lumper fees are paid by the shipper, receiver, or broker. Lumper fees are typically $100 or more, and lumper receipts are usually required for proof of service and reimbursement of lumper payments made by a driver. If one is charged lumper fees, Lumper payments can usually be made with cash, fleet check, or credit card.