AUSTIN, Texas — American Express is overhauling its mobile check deposit for some of its accounts, an executive disclosed today.

In an offhand comment during a presentation at the Digital Banking Summit here today, Stefan Happ, chief commercial officer, enterprise growth at Amex, revealed that the card company was “in the process of significantly improving” its mobile check deposit service for its Bluebird and Serve product lines, which have many similarities.

The move is especially noteworthy because Bluebird and Serve are intended for the underserved market, so exceptional RDC is crucial.

It was not clear from Happ’s presentation what is less-than-acceptable about the current mobile check deposit on the Bluebird and Serve apps.

Happ did reveal that the two products last year reached a combined load volume of $7 billion, up 300% since 2012. About 40% of Bluebird and Serve volume comes from direct deposit.