At one time, transactions between merchants and consumers were often sealed with a handshake. This handshake was more than a kind gesture—it helped reassure both parties that the other was committed to the deal and would correct any problems. As more transactions occur online, finding fair and efficient resolution of problems that arise can be challenging. In a new book, a University of Missouri legal expert says it’s in the best interest of both retailers and consumers to establish a new virtual handshake to bring trust back into such interactions.