In this paper, we present a visual knowledge modeling of an information logistics process. The model illustrates the knowledge and facts of the knowledge base, as well as the data in the database, which are needed for the handling of e-services when a case study is applied on e-invoicing. The Unified Modeling Language is used to visually describe a model for knowledge acquisition and handle the Information Logistics Process. The practical case illustrates the ideas of e-invoicing between 50 000 small and medium sized enterprises that are using the same enterprise system.