Paying with cash used to be a way to get a discount. These days it can often cost an extra $1 to $6—the sort of transaction fees once limited to swiping a credit card or using an out-of-network ATM.
“It’s unbelievable that we actually have to tell retailers, ‘This is U.S. currency and it’s something that should be accepted,’” said Jonathan Alexander, executive director of the Consumer Choice in Payment Coalition, a group of businesses and nonprofits lobbying for the continued acceptance of cash.
https://www.wsj.com/personal-finance/paying-cash-fees-reverse-atm-744d1bd6?mod=hp_lead_pos6