New start-ups have been putting together software that helps banks and dispensaries monitor and record transactions, with the long-term goal of moving transactions away from cash.

When Lamine Zarrad was not at his job as a federal banking regulator in recent months, he was spending a lot of time at Denver’s marijuana dispensaries.

As a federal employee, he could not partake of the pot.

He was there, instead, to pitch the shops on a start-up he has been working on in his free time and is making official this week after quitting his job as a bank examiner at the Office of the Comptroller of the Currency, a division of the Treasury Department.

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Nathaniel Popper ~ New York Times ~