Merchant Category Restrictions on Crypto Cards: What You Can and Can't Buy

Your Tangem Pay virtual Visa credit card is accepted at Visa-accepting merchants worldwide, subject to applicable merchant restrictions and eligibility requirements. But not every merchant that accepts Visa is automatically supported. Some categories are blocked at the card program level, and if you hit one of those, the transaction will simply decline, with no error message explaining why.

Quick answer: Tangem Pay currently blocks gambling establishments, online gambling, standalone liquor stores, adult content platforms, and certain money services, depending on MCC and jurisdiction. It generally works for everyday categories like groceries, restaurants, retail, travel, subscriptions, transport, health, and pharmacy at Visa-accepting merchants worldwide, subject to applicable merchant restrictions, spending limits, and eligibility requirements. This guide covers how that system works, which categories are currently blocked on Tangem Pay, where the card works well, and what to check when a payment fails at a merchant you expect to work.

What Are Merchant Category Codes (MCCs)?

Every merchant that accepts Visa is assigned a four-digit Merchant Category Code (MCC). The MCC is set by the merchant's acquiring bank when the business configures card acceptance; the merchant doesn't choose it themselves. Think of it like a product taxonomy for businesses. A grocery store gets one code, an airline gets another, and an online software subscription gets a third. When you tap your phone at checkout or enter your card details online, your card issuer sees that MCC in the transaction data and decides: approve, decline, or flag.

Here's where it gets interesting. The same physical location can carry different MCCs for different business activities. A $75 grocery checkout can be approved because the supermarket MCC is allowed. A $75 betting-shop or standalone liquor-store transaction can be declined if the merchant category is blocked.

Card programs configure which MCCs they allow and which they block. Tangem Pay is no exception. As a virtual Visa credit card issued in partnership with Rain, Tangem Pay follows a defined set of MCC rules that determine where the card works.

Why Are Some Merchants Blocked?

A common assumption is that "accepts Visa" means a card will work anywhere Visa is accepted. That's not quite right. Merchant restrictions are used for regulatory compliance, AML and fraud risk management, program-level risk, and consumer protection. Beyond that, every card program adds its own layer of controls. The result: two Visa cards from different programs can behave differently at the same terminal.

The reasons for blocking specific merchant categories come from several directions. Regulatory requirements, risk management, and consumer protection all play a role, and they interact with each other in ways that aren't always obvious to the cardholder.

Merchant Restrictions Exist for Several Reasons

Regulatory compliance is the starting point. Visa's operating rules require issuers to block certain high-risk merchant types in specific jurisdictions. A transaction must be legal in both the cardholder's jurisdiction and the merchant's jurisdiction, and some categories create legal complications that card programs resolve by blocking them outright.

AML and fraud risk are the second driver. Certain merchant categories carry elevated money-laundering or chargeback exposure. Gambling, quasi-cash transactions, and some money services businesses generate above-average disputes and cross-border flows, which makes them higher risk at the program level. MCC-based blocking is a scalable way to keep those risks out of the card system.

Program-level decisions matter too. Card programs serving specific customer segments may choose to block categories that don't align with the program's purpose, regardless of what Visa strictly requires.

Consumer protection rounds out the picture. Some categories are restricted to prevent access by minors or to reduce harm from services associated with addiction or high-pressure sales.

These aren't arbitrary choices by Tangem. They're part of operating a compliant Visa card program in partnership with Rain.

The following merchant categories are currently blocked on Tangem Pay:

• Gambling establishments: casinos, card rooms, and betting shops (MCC 7995 and related codes)
• Online gambling: internet betting, online casino platforms, and digital lottery
• Liquor stores: standalone alcohol retail (note: restaurants and bars that serve alcohol as part of dining are classified differently and may not be blocked)
• Adult content platforms: subscription or one-time purchase of adult content
• Certain money services: depending on MCC and jurisdiction, some currency exchange and money transfer businesses may be restricted

This list reflects current program rules and is subject to change. For the most current merchant category information, refer to tangem.com/en/tangem-pay/ or contact pay@tangem.com.

What Tangem Pay Works Well For

The blocked categories above are a small subset of the merchant universe. For everyday spending, Tangem Pay covers a wide range of merchant types at Visa-accepting merchants worldwide, subject to applicable merchant restrictions, spending limits, and eligibility requirements.

Groceries and supermarkets work as expected, both in-store and online grocery delivery. Restaurants and cafés are supported, including delivery apps and online food ordering. Standard retail (clothing, electronics, home goods, sporting goods) works online and in person. For travel, airlines, hotels, and booking platforms are generally supported, though some hotel reservations require a physical card for deposit. Tangem Pay is currently virtual-only, with physical cards planned for future release.

Online services and subscriptions, streaming platforms, software, and SaaS tools work wherever those merchants accept Visa credit cards. Transport covers rideshare, public transit, and parking. Health and pharmacy purchases are supported, subject to merchant-level Visa acceptance.

For in-store payments, Tangem Pay works via Apple Pay and Google Pay wherever NFC-enabled payment terminals accept Visa. You add your virtual Visa card details to Apple Pay or Google Pay during setup, then tap your phone at the terminal like you would with any contactless payment.

One thing worth knowing: USDC funds the card balance, converted 1:1 to USD when a purchase is made. The merchant receives a normal USD payment; they never see the crypto side of the transaction. Tangem Pay has no transaction fees or monthly fees; the only costs are Polygon gas when you top up and standard Visa foreign exchange rates on non-USD purchases.

What to Do If Your Card Is Declined at a Legitimate Merchant

A decline at a merchant you expect to work with is frustrating. Most of the time, the cause is one of six things, and they're worth checking in order.

1. Insufficient card balance. This is the most common reason. Check your Tangem Pay balance in the app and top up if needed. Remember that funds become available after blockchain confirmation on Polygon, so a recent top-up might not have settled yet.

2. Card not yet activated. Confirm that KYC verification was completed and the card is fully active. Tangem Pay setup requires completing identity verification through Sumsub using a government ID and face verification. If that step was skipped or not completed, the card won't process payments.

3. Merchant MCC restriction. The merchant's MCC may fall into a blocked category. This can happen even at merchants that look unrelated to gambling or adult content, for example, a multi-service business whose acquiring bank assigned a code that maps to a restricted category. If you believe a legitimate merchant is incorrectly blocked, contact pay@tangem.com.

4. Spending limit reached. Tangem Pay has configurable daily spending limits. Check your limit settings in the app.

5. Technical issue. Retry the transaction. For online purchases, try entering your card details manually rather than using Apple Pay; sometimes, the tokenized payment path behaves differently than direct card entry.

6. Card details mismatch. For online purchases, confirm you're using the correct card number, expiry date, and CVV from the Tangem app. These details are specific to your virtual Visa card and won't match those of a physical card or another account.

If none of these resolve the issue, contact pay@tangem.com with the merchant name and the approximate time of the transaction. For disputes, Rain is the card issuer; dispute support is available at support@paera.com.

Conclusion

Crypto card merchant restrictions exist on every Visa card program. Tangem Pay is no different: it blocks a defined set of high-risk categories (gambling, online casinos, liquor stores, adult content, and some money services) while supporting the vast majority of everyday spending, groceries, restaurants, retail, travel, subscriptions, transport, health, and pharmacy purchases, at Visa-accepting merchants worldwide. If your card is declined at a merchant you expect to work, run through the six-point checklist: balance, activation, MCC, spending limit, technical retry, card details. Most issues resolve at step one or two.

For current merchant category information, refer to tangem.com/en/tangem-pay/ or contact pay@tangem.com. For dispute support, reach Rain at support@paera.com.