The mail order business is a rapidly growing and constantly changing market for products and services of all kinds. In contrast to the stationary retail trade, products can be offered worldwide by catalogue, brochure, internet, television or representatives. Today the focus is on orders via the Internet. The trend today is clearly towards omni-channel distribution - companies distribute their goods through several channels or even through different companies. Customers have the possibility to order their goods online and pick them up at the store. Customers expect fast delivery, continuous status information and favourable prices.