There may be a contract for the sale of goods whose acquisition by the seller depends on an emergency that may or may not occur. If a condition must be fulfilled before the seller comes into possession of the goods, the contract for the sale of goods shall be concluded only when the condition is fulfilled. For example, if A agrees to sell the goods to B when a particular ship arrives with the specific goods that have been contractually agreed for sale, A is only required to deliver goods when the ship in question arrives with the contractually agreed goods. If, through a sales contract, the seller claims to influence a current sale of future goods, the contract is considered a sales agreement. Future goods are goods that must be created. A contract for the sale or assignment of future goods is an agreement to be sold. It only creates a personal obligation under the law.