Of course, such customers have a personalized service, special loyalty program and other bonuses of corporate buyers. In technological sense, these business processes are absolutely new and they are to be described and implemented within the framework of exchanges between the systems. This model is complicated by the fact, that legal entity has different representatives and each representative should have a power of attorney, also legal entities merge into holdings and etc. In such conditions it is important not only to maintain customer experience, but improve it, since these customers are trade locomotive. For example, PRO customers can have orders assembled at different shopping centers of one town or sales in excess of balances.