Another Credit Union Sues Fiserv As Legal Fight Grows, Alleges Seven-Figure Fee To Leave
By CU Today Staff —
GRAND RAPIDS, Mich.— Marshall Community Credit Union has sued Fiserv in federal court in Michigan, alleging the technology provider failed to provide adequate cybersecurity protections, suffered repeated system outages and would impose seven-figure fees if the $370-million credit union attempted to move to another provider.
The lawsuit, filed Oct. 5 in U.S. District Court for the Western District of Michigan, joins a growing number of credit union lawsuits against Fiserv previously reported by CUToday.info. MCCU serves approximately 18,500 members.
MCCU alleges Fiserv stores and processes sensitive member information across systems including Portico, Corillian and its mobile banking application, but has failed to provide appropriate security controls on multiple systems. The complaint alleges MCCU submitted more than 160 support tickets in 2025 and more than 120 so far in 2026. It also alleges that from the beginning of 2025 through approximately July 2026, SecureNow experienced 37 outages, Corillian 32 and Portico 26.
The credit union further alleges Fiserv would demand seven-figure early-termination and deconversion fees if MCCU attempted to transfer its data to another provider. MCCU is seeking damages as well as declaratory and equitable relief that would block what it describes as improper exit charges and require protections for its members. The complaint cites other litigation involving Fiserv and U.S. Courthouse SDNY FCU, Bessemer System FCU, Cencap FCU, Self-Help FCU, FiCare FCU, POLAM FCU, Educational & Governmental Employees FCU and Midwest Family FCU.
“Our clients take their duty to protect their members seriously—and expect their technology providers to do the same,” said Charles Nerko, managing partner of NERKO PLLC, which is representing MCCU. “When vendors fail to deliver, credit unions deserve accountability.”
Originally reported by CU Today.