Skip the receipt checker on your way out of Costco, and you might not get back in. The warehouse giant has put members on notice: the company reserves the right to cancel memberships for shoppers who refuse to comply with its exit procedures, abuse return policies, or mistreat employees, and it is tightening enforcement to back up that warning.
The policy is not new, but the crackdown is gaining teeth. Costco's membership agreement states the company "reserves the right to refuse, decline, or cancel a membership at any time." That broad authority covers everything from dodging the door checker to repeatedly signing up and canceling to game the system. For the 145 million cardholders paying $65 a year, the message is plain: follow the rules or find another store.
Every Costco shopper knows the ritual. You load a flatbed cart, pay at the register, then wait while an employee at the exit compares your receipt against the items in your cart. It takes seconds. Some members treat it as an annoyance, or simply walk past.
Costco has said it keeps losses low by "strictly controlling the entrances and exits." That line is not corporate fluff. In an era when retail theft costs the industry billions, Costco's membership-gated model gives it a structural advantage most competitors lack. The receipt check is the last link in that chain. Walk past it, and you undermine the system that keeps prices low for everyone else.
The company has also tightened checks in recent years. ID verification at the door and membership-card scanners at entrances have rolled out in several states. The goal is straightforward: make sure the person walking in actually holds a valid membership, and make sure the person walking out paid for what's in the cart.
Costco CFO Gary Millerchip said the company's newer receipt-scanning technology delivers "an average transaction time of around eight seconds." That is fast enough to keep the line moving even on a packed Saturday.
Millerchip offered an upbeat assessment of the early rollout:
"Early results show this is improving the flow of traffic, and we have received great member feedback."
Not every store has had the same experience. One unnamed worker described a rougher rollout at their location, where the pre-scan self-check system launched over Easter weekend, one of the busiest shopping periods of the year:
"We have 3 self check and 3 prescan only self check lanes and it is horrible here. They rolled it out Easter weekend for my store and that was such a bad idea because everyone including the members just got more stressed and p***ed off in some cases."
Another commenter was blunter: "It's slower now." The gap between corporate optimism and ground-level frustration is worth watching. Costco has already pulled back on self-checkout in some locations, shifting employees back to the scanning side of the register. The company appears willing to experiment, and to reverse course when a change doesn't work.
Receipt-check refusal is only one trigger. The broader list of behaviors that can cost you your Costco card reads like a catalog of common-sense violations that most honest shoppers would never commit.
Abusing the return policy is a big one. Costco's generous return window has long attracted members who buy, use, and return items well past any reasonable period. The company tracks return patterns, and members who exploit the system risk cancellation.
Sharing or misusing a membership card is another. Costco memberships are non-transferable. Letting a friend or relative use your card, or using someone else's, violates the agreement. The entrance scanners and ID checks rolling out in several states are designed in part to catch exactly this behavior.
Mistreating employees can also end a membership. Workers deal with crowded aisles, long lines, and the occasional hostile shopper. Costco has shown a willingness to enforce checkout and transaction rules firmly, and management can remove a member from the store and cancel the card on the spot.
Theft or attempted theft carries the most severe consequences, not just membership cancellation but potential legal action. And members who repeatedly cancel and rejoin to exploit promotional deals or reset return histories may find it harder to sign up again.
Costco's growth tells its own story. The company opened more than 300 new stores between 2011 and 2024. By 2025 it counted 145 million members, each paying $65 a year for access to bulk groceries, discounted fuel, free samples, and services ranging from optical to travel.
That model works because the membership fee creates a barrier to entry, and a lever for accountability. Unlike an open-door retailer, Costco knows who its customers are. It can track purchases, flag abuse, and revoke access. The receipt check at the exit is the most visible expression of that control, but it sits inside a much larger system of in-store rules and compliance expectations that most members never think about.
The company has not identified any specific member whose card was pulled for skipping the receipt line, and it has not disclosed how often cancellations happen. The membership agreement gives Costco wide discretion, and the company appears content to let the policy's existence serve as its own deterrent.
Several details remain unclear. Which states have received the new entrance scanners? How many memberships has Costco actually revoked in the past year, and for what reasons? Where and when did Millerchip make his public statements about the eight-second transaction time? And will the pre-scan self-check lanes survive their rocky debut, or will Costco pull back again as it has with other checkout and exit-flow experiments?
None of those gaps change the core reality. Costco built a business on low prices, high volume, and controlled access. The receipt check is not a suggestion. The membership agreement is not a formality. And the company is investing in technology and staffing to make sure both carry real consequences.
Rules only work when someone enforces them. In a retail landscape where too many stores have stopped trying, Costco's willingness to hold the line is the exception, and it's exactly why 145 million people keep paying to walk through the door.