The research reported in this paper extends current knowledge of syndicate data incorporation into data warehouses (DWs). It does so by employing an interview study towards syndicate data suppliers (SDSs). The results describe, in detail, a generic work process, with related problems, for how the SDSs work with the data. In addition, the paper also relates the actors that regulate or collaborate with the SDSs, to the process activities. The results show that the SDSs encounter problems like transcending data errors, non-interoperating systems, and a non-tailoring attitude among their sources.