For a while, it seemed as though stores like Walmart and Costco were considering eliminating self-checkout due to customers’ complaints about malfunctioning machines and incorrect pricing. But it looks like the convenience of faster lines and less human interaction won out in the end. So, with the technology here to stay, we’re helping you ensure you’re not making any mistakes that’ll have you spending more money than you should be. To find out where you might be going wrong, read on for six self-checkout mistakes that will cost you big.

1. You’re not checking for skimmers before you pay.

Criminals will do whatever they can to get access to your financial accounts, including putting skimmers on card machines at major retailers.

But while cashiers can inspect their own readers, Michael P

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