The financial technology company Fiserv Inc. announced Wednesday that Corporate One Federal Credit Union of Columbus, Ohio, has selected CheckFree Advantage Fee software to manage its billing processes.

Fiserv, of Brookfield, Wis., said Corporate One plans to use the software to replace an in-house system to calculate fees for services it provides to more than 800 credit unions.

Corporate One developed and manages the Alliance One surcharge-free automated teller machine network, and provides check imaging and automated clearing house services.

Fiserv also announced Wednesday that the $70 billion-asset Piraeus Bank of Athens is using Fiserv Universal Banking software in Cyprus and Egypt, and plans to use it in a third country. Piraeus Bank has operations in 11 countries.