You need your membership card to get in and a photo on file

Costco provides some fantastic deals, and the retailer maintains low prices through its membership model. This is a significant reason why it operates on a members-only basis. While it was once the case that purchases were impossible without a membership, starting in 2024, you may not even be allowed to enter a Costco warehouse without one.
Most Costco locations now feature card scanners at their entrances, requiring you to scan your membership card for entry. Photos or copies of the card are not accepted; you must present the actual membership card. However, you can't simply borrow a friend or family member's card to shop, as Costco mandates that member photos be displayed on the card. If your card lacks a photo for any reason, you'll need to provide a government-issued photo ID. That said, you can still enter Costco as a guest if you are with a member.
This rule is quite strict, as you cannot technically access a Costco without a membership. If you do manage to sneak in, you will likely be asked to leave, and you won't be able to make any purchases anyway.
You must be a member to make purchases

As previously stated, attempting to enter a Costco without a membership is largely pointless, as you must present your membership card, which includes your photo, at the checkout. The cashier will verify your identity before completing the transaction. While you might be able to enjoy some of the store's popular free samples, that's about the extent of what you can do without a membership.
Even if you're visiting as a guest, you still cannot make purchases on your own. You'll need to pass your selected items to the member, who will handle the payment. Of course, there's nothing stopping you from giving them your credit card or reimbursing them later, but the member must be the one to complete the transaction.
So, what occurs if you attempt to buy something without a membership? It will likely be an uncomfortable situation for both you and the cashier. They will probably kindly inform you that a membership is required for purchases and recommend that you visit the membership desk if you're interested in signing up. Otherwise, you'll have to leave empty-handed.
Don't abuse the return policy

Costco is well-known for its highly flexible and customer-centric return policy. The company offers a 100% satisfaction guarantee, allowing you to return nearly any item at any time, including food, clothing, household goods, and seasonal products. However, certain items, such as electronics, have a 90-day return period.
This policy is beneficial for shoppers, and many customers take full advantage of it. However, some individuals may exploit it. Costco understands that this return policy may lead to some losses, but the company believes that ensuring customer satisfaction will encourage ongoing purchases, which is why the policy remains intact.
That said, even Costco has its boundaries. If you frequently make excessive returns—such as regularly bringing back expired food or returning holiday decorations in the middle of summer—this will trigger alerts in their system. Your account may be subject to closer scrutiny, and you might need to provide a receipt or obtain a manager's approval for future returns. If you continue to misuse the policy, the company may decide to terminate your membership.
Your receipt must be inspected when you leave

A quick trip to Costco is virtually impossible. The warehouses are vast, and there are multiple checkpoints for members during your visit. We've already mentioned that you must scan your membership card upon entry and present it again at checkout, but you'll also need to have your receipt checked when you exit the store.
According to the Costco website, "It is standard practice at all our warehouse locations to verify purchase receipts when customers exit our buildings." The company cites two main reasons for this: the first is to maintain accurate inventory control, and the second is to ensure that members have been correctly charged for their purchases. Ultimately, both reasons relate to loss prevention, as they aim to deter shoplifting. However, this policy can also benefit customers, as it helps catch instances where items may be double-scanned or not rung up at the correct sale price.
While it is not legally mandated for you to show your receipt, it is a policy of Costco. This means you won't face legal consequences for refusing to show your receipt unless you have stolen something. Nevertheless, Costco reserves the right to terminate your membership for any reason, including a refusal to present your receipt.
No shirt, no shoes, no service

The expression "no shirt, no shoes, no service" has been in use for over 50 years, so it's not surprising that Costco adheres to this guideline as well. While the exact origins of the phrase are somewhat unclear, some believe it may trace back to the hippie movement of the 1970s. Regardless of your views on free love, the rule is upheld for hygiene and safety purposes.
Walking barefoot can introduce germs and bacteria, which is undesirable in a place that sells food and household items. Although shoes can also carry in dirt, bare feet tend to sweat significantly, creating an environment conducive to bacteria and fungus growth. More importantly, it's a matter of safety. Big box stores have various hazards on the floor, and being shoeless increases the risk of serious injury. For instance, if a glass jar shatters or a pallet rolls over your foot, it would be far more painful without footwear.
The requirement for shirts is likely rooted in general decency and social norms. If you attempt to enter a Costco without a shirt or shoes, you will probably be asked to either dress appropriately or leave. It's unlikely that your membership would be revoked unless you cause a disturbance or frequently shop inappropriately dressed.
Pets aren't allowed, but service animals are okay

Most large retail stores, including Costco, enforce a "no pets" policy. However, like many retailers, Costco makes an exception for service animals as defined by the Americans with Disabilities Act (ADA). The ADA specifies that "only dogs that have been specially trained to perform specific tasks for individuals with disabilities qualify as service animals." This definition does not extend to emotional support or therapy animals.
Under the ADA, Costco staff are permitted to inquire whether a dog brought into the store is a service animal and what specific tasks the dog is trained to perform. However, they cannot ask for further details or demand proof of the dog's status. Employees must trust customers to provide honest information.
If you attempt to enter the warehouse with a pet that is not a dog, you will likely be asked to leave and may be advised to keep your pet in the car, ensuring the windows are slightly open for ventilation. Additionally, if you are accompanied by a service animal that violates health and safety regulations, the store has the right to ask you to leave. Fortunately, this should not be a concern if your service animal has received appropriate training.
Firearms and other weapons are forbidden (with exceptions)

In addition to prohibiting pets, Costco also forbids members and guests from bringing firearms or other weapons onto its premises. While the company does not specify what constitutes "other weapons," it is reasonable to assume that any item designed to harm or kill living beings is prohibited.
This policy applies to all Costco locations, even in states that permit open carry. As a private business, Costco has the right to require that firearms be left outside its facilities. This policy is implemented to ensure the safety of both customers and employees, and Costco is willing to refund membership fees to those who disagree with it.
If you attempt to enter with a firearm or any type of weapon, you will be asked to leave. There is also a possibility that security or law enforcement may be contacted. However, there is one exception to this rule: authorized law enforcement officers are permitted to carry firearms within the warehouses.
Costco can check your bag if they want

Most retailers take measures to deter shoplifting, and Costco is no exception. They check receipts and may inspect bags when they find it necessary. When you sign up for a membership, you agree to the policy that "Costco reserves the right to inspect any container, backpack, briefcase, or other bag, upon entering or leaving the warehouse."
This inspection is more likely if you have a large bag, such as a diaper bag, tote, or backpack, or if an employee perceives you as acting suspiciously. If you're buying items like luggage, an employee might also request to look inside. This doesn't necessarily imply that they suspect you of theft; sometimes, it's just a standard procedure, especially in stores that have experienced significant inventory discrepancies.
You have the option to decline the inspection, but be aware that Costco may choose to revoke your membership in that case. If you believe you have been unfairly targeted, you can ask to speak with a manager or contact Costco's corporate office for assistance.
Don't harass other customers (or employees, for that matter)

Even if you don't consider yourself religious, you've likely come across the Golden Rule, which advises treating others as you wish to be treated. Sadly, some individuals seem to have missed that message. Numerous websites and subreddits are dedicated to sharing accounts of people behaving rudely or feeling entitled in public spaces. It's no surprise that such behavior occasionally spills over into warehouse chains like Costco.
While it can be challenging to locate items in Costco due to the lack of aisle labels, it's important not to take your frustration out on employees or fellow shoppers. Costco emphasizes its commitment to creating a shopping atmosphere that is free from all forms of harassment and discrimination for employees, applicants, independent contractors, members, and suppliers.
Many stores might overlook minor rudeness, believing it's best to let disgruntled customers move along. However, those who engage in harassment or abuse towards staff or other patrons will likely be asked to leave. Depending on the severity of their behavior, they may also face membership termination and/or the involvement of law enforcement.
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