People treat their Costco membership like it’s bulletproof. They figure as long as they keep paying their $65 or $130 a year, they can pretty much do whatever they want inside those warehouse walls. That’s not how it works. Costco’s official policy is blunt — they can terminate your membership at any time, for any reason, without even telling you why. And they’ve actually done it. More than most people realize.
The thing is, Costco isn’t out to get anyone. Employees aren’t walking around with clipboards looking for reasons to boot you. But there are specific behaviors that will absolutely put you on their radar — and once you’re flagged, your membership card becomes a very expensive piece of plastic. Here’s what gets people banned.
Abusing the Return Policy Is the Number One Way People Lose Their Membership
Costco’s return policy is legendary. No time limits on most items, no receipt needed, and they’ll take back partially eaten food if you genuinely weren’t satisfied. It’s the most generous return policy in American retail, and it’s a huge reason people love shopping there. But some customers have turned it into a sport — and Costco has started keeping score.
One of the wildest stories floating around comes from a long-time member named Maryam Nicksolat, who’d been shopping at Costco since 2006. She tried to return a printer she’d purchased in 2010 — eight years after buying it. She figured the policy was the policy. But just because there’s no posted time limit doesn’t mean a store manager won’t raise an eyebrow when you roll in with a printer from the Obama administration.
Then there’s the pair of guys a former employee described on Reddit. They came in to return two TVs, which wouldn’t be unusual on its own. Except this was the seventh and eighth television these two had returned within 90 days — always conveniently just before the 90-day electronics return window closed. The general manager didn’t even blink. He accepted the return, laid a membership fee refund on the counter, and told them they were done. Membership revoked, right there at the service desk.
And you might remember the young couple who went viral on TikTok for returning an air conditioning unit in the fall after buying it at the start of summer, calling it “the greatest heist in human history.” YouTuber Parker Seidel made a whole bit out of returning things like three-week-old cut flowers he’d never bothered putting in water. This stuff gets attention — and not the good kind.
Costco tracks every purchase and every return tied to your membership account. Patterns emerge fast. If you’re making numerous returns every single month, or returning seasonal items after you’ve clearly used them all season, management will notice. The exact threshold isn’t published, but consistently returning items in bad condition, making returns that far outpace your purchases, or bringing back stuff that’s clearly been used into the ground will get you flagged.
The Cancel-and-Renew Trick Will Get You Permanently Blocked
This one’s clever, and Costco has seen it a thousand times. Here’s how it works: you use your membership for 10 or 11 months, then walk up to the desk and cancel it. Costco refunds your full membership fee, no questions asked. Then you immediately say, “Great, now sign me back up.” You just got a free year of Costco. Rinse and repeat.
A Costco employee who went by CostcoPanda on Reddit shared the perfect example. A member came in to cancel after about 10 months, got the refund, and immediately said, “Just take that and sign me up again.” When the employee asked about it, the customer flat-out admitted they do this every year because they “don’t believe in membership fees.” The customer even threatened to go to a different location if they were given trouble.
The employee pulled up the membership history and confirmed this person had been doing the same cancel-and-renew cycle every single year. The account was deactivated for a “policy violation” — a designation that means it can’t be restarted without a manager’s override. Good luck getting that override when the notes on your file explain exactly what you were doing.
Sharing Your Membership Card Is No Longer Something Costco Ignores
For years, card sharing was one of those unspoken things everyone did and nobody got called out for. Your mom borrows your card, your roommate uses it at self-checkout, your buddy scans it and pays cash. It worked because nobody was really checking.
Those days are gone. Costco started cracking down on this in 2023, and the enforcement has only gotten stricter since. Shoppers are now being turned away at checkout when the photo on the membership card doesn’t match the person standing there. One TikTok that racked up over two million views showed a customer whose mother got banned from Costco after trying to use his father’s card at self-checkout. The family’s second household card had been assigned to the son when he went off to college, leaving the mother without a valid card of her own.
Self-checkout used to be the loophole. Scan the card, bag your stuff, walk out. But Costco now has staff checking membership cards at self-checkout registers, with signs reminding shoppers that “only paid members are allowed to shop.” And if you get flagged for repeated violations, it’s not just your local warehouse saying no. It’s a corporate block — your membership number is flagged system-wide. You can’t just drive to the next town and try again.
The math behind why Costco cares: they pulled in over $4.8 billion in membership fees in their last fiscal year. Every person borrowing someone else’s card is a person not paying their own $65. Multiply that across millions of casual “borrowers” and you see why corporate decided the casual approach wasn’t cutting it anymore.
Being Rude to Employees Is Taken Very Seriously
Costco pays its employees well. Health insurance, dental care, retirement plans, wages that are well above the retail average. This isn’t an accident — Costco values its workforce, and management expects customers to treat them with basic decency. When you don’t, things escalate quickly.
One former Costco employee shared her experience on Reddit after working as a sample lady for five years. A member kept sneaking up on her and tickling her. He was told repeatedly to stop. He didn’t. He got banned from the store.
Another story involved a customer who gave the greeter a hard time about showing their membership card. A manager stepped in and gave the customer a simple choice: show the card or have your membership canceled. No debate, no back-and-forth. In another incident, members screamed at a manager, who calmly pointed to his radio, confirmed the interaction was being recorded, and informed them their membership was being canceled and refunded on the spot.
Yelling at employees, threatening behavior, physical altercations, harassment — all of it can result in immediate membership cancellation at the store manager’s discretion. There’s no appeals process that anyone’s talked about publicly. You’re just done.
Skipping the Receipt Check and Other Rule Violations
That person at the door who checks your receipt and draws a smiley face on it? They’re not optional. Receipt checkers exist to make sure everything in your cart was actually scanned and that you weren’t overcharged. It’s one of the ways Costco keeps prices as low as they are. Blowing past them, refusing to stop, or making a scene about it violates the membership terms you agreed to when you signed up.
Theft is an obvious one, but it goes beyond just pocketing items. Employees have reported finding meat stashed behind dry dog food, and customers switching price tags — peeling stickers off cheaper cuts of meat and slapping them on expensive ones. That’s not just theft; that’s the kind of thing that gets your membership revoked and potentially gets law enforcement involved.
There are also smaller rules that most people don’t think about. You have to wear shoes and a shirt. You can bring up to two adult guests, but they can’t make purchases on their own transaction. Buying items in bulk for commercial resale without a business membership is against the rules. Even filling an unauthorized container at the Costco gas pump or walking away from the pump while it’s running are violations.
How To Stay on Costco’s Good Side
The reality is that the vast majority of Costco members will never come close to getting their membership pulled. Actual bans are rare. But the people who do get banned almost always thought they were being clever or figured the rules didn’t apply to them.
If you need to make a legitimate return, make it. That’s what the policy is for. If your product is genuinely defective or not what was advertised, Costco will take it back and be happy to do it. Just don’t turn returns into a lifestyle.
Add your spouse or household member to your account — every membership comes with one free household card for someone at the same address. It takes five minutes at the membership desk. Stop lending your card to friends and family. If they want to shop at Costco, they can get their own membership or go with you as a guest.
Be decent to the employees. Stop at the receipt check. Don’t try to game the cancellation policy. These aren’t complicated asks. They’re just basic rules for keeping your access to $1.50 hot dogs and 48-packs of toilet paper — which, honestly, is a pretty good deal worth protecting.
