The complaints, including one disclosed in Fiserv’s own SEC filings (In re Fiserv, Inc. Securities Litigation, S.D.N.Y.), allege that Fiserv forced merchants on its older Payeezy platform to migrate to Clover, temporarily inflating Clover’s reported growth, and that a significant portion of those merchants then fled to competitors because of Clover’s high pricing, inadequate customer service, downtime, and compatibility problems. In other words, the investors’ theory of the case is that merchant mistreatment was the concealed fact. When the truth surfaced across 2025, the stock fell 18.5% in April, 16% in May, 14% in July, and 44% in late October. A shareholder derivative suit followed in January 2026. Reporting on the litigation describes roughly 200,000 legacy Payeezy merchants swept into the migration. Fiserv has stated it intends to vigorously defend these cases, and all of this is reported here as allegation, not adjudicated fact.

Our review located no FTC consent orders or state attorney general enforcement actions against the merchant business, and the category is scored accordingly. The merchant-facing litigation lives in the CardConnect channel.

Our methodology normalizes complaint volume by company size, and Fiserv still scores at the bottom, because industry reviewers made the same observation years ago: other large processors did not come anywhere near First Data’s complaint volume, even accounting for its enormous client base. The recurring themes:

The pattern merchants should internalize: platforms get acquired, then retired, and the merchants on them get migrated to whatever the parent needs to show growth on. Per the litigation record, the migration destination came with higher prices, and leaving came with the exit clauses documented above.

Full marks for public-company disclosure: the SEC filings even disclose the litigation quoted throughout this page. Deductions land where merchants live. There is no published rate card; pricing is quoted per merchant and varies wildly by which of thousands of resellers sold the account. And 2025’s leadership churn was material by any standard: the CEO departed for government, the CFO moved to a special advisor role, and the stock lost more than 40% of its value on disclosures about the merchant business. To Fiserv’s credit, independent auditors note genuine interchange-plus pricing is available and negotiable for merchants who know to demand it. Most don’t know. That is the point of this page.

Is Fiserv a good processor? Based on the documented record, Fiserv scored 43 out of 100 under the published weAudit Rating Methodology, a band reserved for companies whose record warrants extreme caution: three across-the-board rate increases in nine months, liquidated damages termination clauses, a litigated junk-fee record, and active securities litigation tied to its treatment of merchants. The technology is capable; the documented conduct is what the score measures.

Fiserv’s technology is genuinely everywhere, and much of it is genuinely good. That is precisely why the 2025 record matters: when the largest processor in America layers three rate increases into nine months while its own investors allege the growth story ran on merchant churn, the merchants who never look at their statements are the ones funding it. Three things to do this week: