To mark the second anniversary of the Occupy Wall Street movement last month, an assortment of protests, marches and rallies were held, to support or oppose mostly predictable causes.

At the same time, a far more surprising undertaking began with far less fanfare: creating a prepaid Occupy debit card.

The idea, led by a group that includes a Cornell law professor, a former director of Deutsche Bank and a former British diplomat, is meant to serve people who do not have bank accounts, but it also aims to make Occupy a recognized financial services brand.

On Sept. 17, the day of the anniversary, the group, known as the Occupy Money Cooperative, began raising money to pay for initial operating expenses. The group’s Web site invites visitors to “join the revolution,” suggesting that using the card might represent a “protest with every purchase.” That language evokes the spirit of the sprawling encampment of tents and tarps that briefly took over Zuccotti Park in 2011, and several people who were familiar figures there have endorsed the mission of the card, which its founders have described as “low-cost, transparent, high-quality financial services to the 99 percent.”