A Receipt For Disaster

Why that little slip doesn’t belong in your recycling bin

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The Saturday Morning Journey: You buy a coffee, and after 43 seconds contemplating why you should give the barista a 25% tip versus a 20% tip, you tap your iPhone to the payment terminal and the barista hands you a receipt. You fold it, forget in your coat pocket for a week, and then you do the responsible thing and toss it in the recycling bin. It’s paper, after all. 

Except this is the one piece of paper you shouldn’t recycle. 

Here’s where your receipt goes next

Your recycling gets picked up, sorted, and the paper gets baled and sent to a mill. There, it’s turned into a mushy pulp made into new paper, most often the low-grade stuff: paper towels, napkins, toilet paper, and the cardboard used in food packaging. The receipt, and what’s on it, is included. 

What about the ink? 

There isn’t any. Next time you’re at the register, notice that the receipt printer never needs an ink cartridge. Most receipts are thermal paper, and the “printing” is really a tiny chemistry experiment. 

The paper is coated with two main ingredients: a dye that’s colorless until it meets an acid, and an acidic chemical called a “developer.” The printer has a row of tiny heating elements. Where it heats a spot, the coating melts, the two ingredients meet, and that spot turns black. That’s how you get your total. It’s actually a really clever technology. It’s fast, cheap, and there’s no ink to replace. The National Cash Register Company developed it in the 1960s. It also explains why old receipts fade to blank: the color reaction slowly reverses, and heat, light, and humidity speed it up. 

What’s On A Receipt?

For decades, that acidic “developer” was BPA (bisphenol A), the same chemical that got pulled off baby bottles and Nalgenes because it can mimic estrogen in the body. It’s not a trace contaminant on the receipt. It’s one of the main ingredients, sitting loose on the surface in powder form, which is why it rubs off onto your fingers. 

In 2011, researchers at the New York State Department of Health found BPA on 94% of the thermal receipts they tested. They also found it in recycling paper products like napkins and toilet paper, and identified recycled receipts as one of the sources. By their estimate, receipts were responsible for more than 98% of people’s BPA exposure from paper. The receipt you once recycled is now the disposable napkin you’re currently using to wipe your mouth. Yikes.

“BPA-free” doesn’t mean what you think. 

After BPA got a bad reputation, a lot of receipt makers switched. Mostly, they switched to BPS (bisphenol S), its close chemical cousin. BPS shows similar hormone-disrupting activity in lab studies, and there's an argument it's worse in one way: it sticks around in the body and the environment longer. Both can interfere with hormone signaling, although the effects depend on the chemical, dose and type of exposure. Exposure to BPA has been tied to a higher risk of obesity and type 2 diabetes, and it has also been linked to heart disease. BPS, the common “BPA-free” substitute, offers little relief: researchers found it disrupts the body’s response to estrogen, affecting cell growth and hormone release at extremely low doses, and a December 2025 study found BPS levels in people climbing as manufacturers swap it in for BPA.

When the Ecology Center tested 374 receipts from 144 big retail chains in 2023, BPA had almost disappeared (under 1%). BPS was on nearly 80% of them.

This has a name: a regrettable substitution. The headline chemical gets swapped for a close relative that hasn't been studied as much, and the label gets to say "BPA-free." It's worth remembering every time you see a "free of ___" claim on anything.

How worried should you be?

One receipt doesn’t make a big difference. For most of us, food is a much bigger source of bisphenols than paper. This isn’t a reason to panic, but a reason to pay attention to a small, avoidable source of exposure and what happens when billions of receipts enter the recycling stream. 

There are a few places that it does matter:

1. The recycling system. One receipt is nothing, but billions of receipts, recycled year after year, means bisphenols spread through the paper supply into products that were never supposed to have them. That’s a problem you can actually help fix by putting receipts in the trash or asking for paperless checkout whenever that’s an option.
2. The people who handle receipts all day: studies of cashiers have found higher levels of BPA in their bodies than in people with other jobs. If you know someone who works with receipts, encourage them to wear gloves! 

The Hand Sanitizer Issue

A 2014 study at the University of Missouri found that people who used hand sanitizer and then held a receipt absorbed far more BPA than people with dry hands. Dry hands picked up only 1% as much. Then they ate french fries with those hands, and BPA levels in their blood increased. Quickly.

The reason: Many hand sanitizers and lotion contain ingredients designed to help things soak into your skin. They don’t discriminate. Sanitize AFTER you take the receipt, not before. 

The 2 Second Test

Not sure if it’s thermal paper? Scratch it hard with your fingernail. If it leaves a dark gray or black mark, it’s thermal and belongs in th trash. SOme stores, including Target, Costco, Best Buy, REI and WHole Foods have switched to receipts without bisphenols, which is great. But the problem is that you can’t tell by looking, and neither can a recycling facility. So most recycling programs say trash all receipts. 

WHY are we still printing receipts? 

We pay with our phones, track packages to the minute and return things with a QR code. So why does a strip of chemically coated paper still come out of almost every register?

Part of the answer is how receipts started. In 1879, a saloon owner in Dayton, Ohio named James Ritty was convinced his bartenders were stealing from him. He patented a machine he called the "Incorruptible Cashier." It rang up each sale so the owner could keep track. A few years later, a businessman named John Patterson bought the company, renamed it the National Cash Register Company, and added a paper roll that recorded every sale. The receipt was born. 

Its first job wasn't to help you, the customer. It was to stop cashiers from pocketing cash. The receipt was proof that the sale went through the register.

Today, stores keep printing for a mix of reasons. Some are good: returns, warranties, expense reports, and the fact that not everyone wants to hand over an email address. Some are just habit: most registers are set to print every time unless someone changes the setting.

Some are about marketing. Remember the CVS receipts that were as long as your arm? By 2013 they'd become a meme, with photos of people holding multi-foot receipts and a parody Twitter account called @CVS_Receipt. The length came from personalized coupons, generated from loyalty-card data and printed right on the receipt. CVS promised to cut its receipts by about 25%, but the coupons stayed.

Of course, digital receipts are just another way to get another marketing email from the store and help them track what you’re buying. Is there no way to win here?! 

The good news: people want options. In a Green America survey, 89% of shoppers said they'd like stores to offer digital receipts, whatever their own preference.

The other good news: this is changing. Washington State banned bisphenols in receipt paper as of January 2026, the EU has limited BPA receipts since 2020, and more big retailers switch every year. Until it’s everywhere, I’m starting a “Just Say No” campaign. Except this time it’s about receipts, not drugs.