If you’re annoyed at how much longer it takes you to check out at the grocery store now that you have a chip-and-pin credit card, you’re not alone — retailers hate the technology too.
It turns out that the new cards are leading to unexpected debit card fees, reports Bloomberg. That is the issue at the crux of the latest suit between retailing giant WalMart (wmt) and credit card company Visa.
Essentially, the fee comes because consumers don’t always know which debit card network to choose when they’re making a purchase, writes Bloomberg:
One small retailer told Bloomberg that the fees added up to around $7,000 per year, no small amount for a small business.