A new problem has faced grocery shoppers recently at the checkout: should they swipe or insert their credit card?

The fingernail-sized chips on credit cards require users to insert their cards instead of swipe them. The new card readers, known as EMV–EuroPay, Mastercard, and Visa — are increasingly popping up in retail stores, but the new technology has caused some confusion.

keep trying pic.twitter.com/cqa7VlNTXK

— Nathan W. Pyle (@nathanwpyle) July 27, 2016

The chips are designed to be safer than the traditional black magnetic bar, according to the official EMV website. They are better at preventing fraud and counterfeit cards. With the new technology, each transaction generates a unique pin number, which is sent to and responded by the user’s bank.

But the chips take longer than the swipe, according to Marc Carlson, Store Director of Safeway on 18h Ave.

Carlson said they have the necessary technology, but still accept the swipe.

“People are still going through the motions,” he says while making a card-swiping motion with one hand. Carlson is not sure when Safeway will make the transition.

When the new system is turned on, shoppers without the chip will still be able to swipe, but the swipe will be able to tell if your card has a chip—in which case it will make you insert your card, according to Carlson.

“It’s basically going to force consumers to use the system,” Carlson said. He he thinks the transition won’t be difficult for customers.

I think 75% of chip card readers are broken at stores. Seems like this tech is failing early on.

— David Wade (@davidwade) August 5, 2016

Katie Conway is the marketing team leader at the Duck Store, which has multiple locations on the University of Oregon campus. Conway is unsure when the chip reader inserts will be available, although the technology has been installed.

“I think the technology is great for better security,” she said, “Customers have to learn the new system, but it will be similar.” The Duck Store has put a card in the chip reader slot to indicate that it is currently unavailable.

Since October 1, 2015, merchants like Safeway and the Duck Store would have been responsible for fraudulent charges if they didn’t have the chip readers, according to the EMV website. However, both businesses are waiting for processors, the banks and firms that oversee each transaction, to approve the technology so that their chip readers will start working.