More than 60% of debit transactions in the U.S. are conducted using Visa's network, with the company earning roughly $7 billion a year in processing fees, according to the complaint.

Visa aims to bridge gaps between in-person and digital payments with a range of new consumer card enhancements available to issuers in various global markets. Visa today announced new digital ...

The new features could mean Americans will be carrying fewer physical cards in their wallets, and will make the 16-digit credit or debit card number printed on every card increasingly irrelevant.

Visa is a very big middleman: It processed $3.8 trillion in U.S. debit transactions in the year through June, generating over $7 billion in processing fees per year, the Justice Department said.