Certain transit price commodities, such as coffee and cigarettes, must be conditioned or treated before being ingested by humans. A modern warehouse has equipment for manufacturing, packing, mixing, grading, and other revenue processes. Potential customers are invited to view the merchandise at a warehouse. Warehouses give the item's owner a certificate for the commodity kept in the storehouse. The owner might collect payments against the assurance of goods by putting recommendations on the warehousing receipt. Numerous nations' warehousing regulations advance payment against products placed in the facility. By warehousing imported commodities in a storage facility, a businessman can pay customs tax in instalments.