Visa, Mastercard, and American Express offer services that issuers can use to update card account details stored at select recurring billers when a new card with a different number is issued to a cardholder. The Visa and Mastercard services can cost card issuers 0.25 cents per update to a merchant. However, both services connect to fewer than 300 billers. A proprietary application programming interface (API) from start-up Switch, called CardSavr, gives card issuers the ability to reach 10,000 sites. In addition, Switch also provides merchants with updated billing information on cardholders,...