The complaint, FleetCor added, is “based upon fundamental misconceptions of the company, its customers and its products.”
In a filing Thursday with the Securities and Exchange Commission, FleetCor said negotiations with the FTC had reached an impasse because of "unreasonable demands for redress."
The FTC has asked the court to issue an injunction against the alleged practices and make FleetCor refund all "ill-gotten" payments.
Ronald F. Clarke, CEO of FleetCor
Among other allegations, the FTC said FleetCor’s invoices did not mention the fees; FleetCor did not post customer payments when they were received, triggering late fees and “high credit risk” fees; and FleetCor promised to stop unauthorized charges but did not do so.
The company last year reported revenue of $2.4 billion and has about 7,600 employees, including at least some overseas.
The suit was filed in the U.S. District Court for the Northern District of Georgia, which is in Atlanta.
In November, FleetCor agreed to settle a class action securities fraud lawsuit for $50 million, according to a report in Law.com, which was based on court filings.
That suit was based on allegations that FleetCor used "predatory" fee practices that inflated company stock in 2016 and 2017, according to Law.com.
Notice of the settlement was filed by the lead plaintiff in the case, the City of Sunrise General Employees’ Retirement Plan, a public pension fund in suburban Miami.