Banks are often taken for granted in digital wallets, treated as a "dumb pipe" for funding another account. PayPal is working to provide a more welcoming atmosphere with deals recently announced with Citigroup, FIS and two other banks.

The growth that followed the turnover of Costco's payment cards from American Express has been greater than expected, according to the bank.

Debby Hopkins, chief innovation officer at Citigroup and chief executive of Citi Ventures, the bank's venture capital investment arm, is set to retire at the end of the year.

Citigroup mobile-app users can now track the status of deliveries of replacement credit cards.

Citibank has launched Touch ID sensor authentication for its iOS mobile banking users in Hong Kong.

Like Uber, Airbnb has become a popular partner for payment companies.

There was once a huge push behind contactless payment cards in the U.S., but eventually issuers lost interest in the format. However, there are signs that contactless payments will make another push.

Citigroup customers can now dispute credit card charges through its app, one of several mobile enhancements the company rolled out Wednesday.

Issuers are watching the consumer response to Citi’s rollout of its cobranded Costco card, which is the largest U.S. portfolio of EMV cards that are also NFC-enabled.