The CEO of mobile payment service startup Square called accusations that the company was distributing credit-card-skimming devices inaccurate and unfair. In a statement posted on Square’s Web site ...

Q: I’m using a Square credit card reader that attaches to my smartphone, but I’m finding that the transactions don’t always go through properly. Is there a certain smartphone or cellular service ...

Christine Sharp-Crowe, an artist and owner of downtown shop Made in the Philtower, said credit card payments used to be a pain to accept at craft shows. "You'd use those awkward devices that rubbed on ...