Purpose -The purpose of this paper is to describe how systems automating the local document supply process (such as integrated library systems and ILL management systems) can be integrated with systems automating regional document requesting (interlending). This is illustrated with a case study of DocFlow, an ILL management system developed in-house at Karolinska Institutet, and its integration with Libris, the national interlending system in Sweden.Design/methodology/approach -The present paper describes how system integration between Libris and DocFlow was accomplished in practice. It also discusses various aspects of integration between systems offering automation of document supply.