BROOKFIELD, Wis. (3/3/08)--Fiserv plans to combine its subsidiary, Interactive Technologies, with CheckFree Investment Services so CheckFree clients can access Technologies’ Advantage Fee billing and revenue management system. About 70 of Interactive’s clients will be affected by the integration. Advantage Fee manages the lifecycle of client billing, revenue management and fee verification processes. The solution offers compliance through automated rules-based processing, process controls over invoice approvals, reports, revenue analysis and custom invoice messaging. Fiserv provides core processing solutions for financial institutions including credit unions.