Merchant

At a pop-up market in New York's Union Square Park this week, locals and tourists squeeze past each other as they make their way through rows of candy cane-striped tents, perusing merchants' products as hurried commuters coming and going from a nearby subway entrance dart through the crowd.

The popularity of the Square payment-card reader has sparked a new market for accessories — smaller versions of the cases and sleeves people commonly buy for the iPhones which Square readers attach to.

Voltage Security, an encryption vendor, is touting Voltage Secure Stateless Tokenization technology, which the company says provides merchants and payment processors with a new approach to protecting card data.

The Electronic Transactions Association has wrapped up the first year of testing for its Certified Payments Professional credential, a designation intended to indicate knowledge of the acquiring industry.

American Express continues its move into a payments arena not often associated with the affluent customers served through the New York-based card network. It now accepts Amex card payments at gas stations commonly located in parking lots near Walmart stores.

The Electronic Transactions Association is remaining true to its original constituents in the acquiring business, even as it opens the doors to other types of companies, according to the trade group’s CEO.

Irish-based Monex Financial Systems Ltd. is looking for American independent sales organizations interested in profiting from card transactions made here by visitors from abroad.

Total System Services Inc., or TSYS, has signed a long-term agreement to provide point of sale services, authorization, settlement, reporting, managed services and risk mitigation for independent sales organizations that work with Merrick Bank, a subsidiary of CardWorks Inc.

First Data Corp. called 2012 the “year of universal commerce,” meaning commerce happens anywhere, anytime and on any type of device.

VeriFone Systems Inc., the largest maker of credit-card terminals, was sued by Creative Mobile Technologies LLC for more than $250 million over an agreement to place advertisements on screens in New York taxis.