FOB (Free on Board) is a contract where the seller fulfills their obligations by loading the goods onto a ship. Under an FOB contract, risk and responsibility transfer from seller to buyer when the goods pass over the ship's rail. There are three variations of an FOB contract depending on who arranges shipping. CIF (Cost, Insurance, Freight) is similar but also includes insurance and freight costs paid by the seller. FOB contracts are lower cost for buyers but impose more duties, while CIF provides more security but at a higher price. Both contracts have advantages and disadvantages that parties must consider.