Virtual Corporate Card: Security and Use Cases

A virtual corporate card is a payment card number that exists only in digital form, no plastic in anyone's wallet. In practice, we are talking about a Virtual Card Number (VCN): 16 digits, an expiry date, and a security code, exactly like a standard card, but delivered via a web portal or API, on demand^[2]. The concept has existed in consumer banking for years; it took hold in B2B because it solves two problems that have long frustrated finance teams: traceability and fraud exposure.

Where a physical card is a single, reusable object, a virtual card is generated in seconds and, depending on configuration, for a single transaction. Three main categories exist: a reusable virtual card (a persistent number assigned to an employee or a recurring use), a limited multi-use card (capped by time or amount), and a single-use card, ephemeral by design, invalidated the moment the transaction clears^[3]. The more targeted the use case, the smaller the attack surface. That is the product's core logic.

One final distinction matters: a virtual card draws from a single funding account (the company's), but each derived number is independent. Compromising one virtual number only exposes the limits set on that number, never the main account. That compartmentalization is what turns a payment tool into a control instrument.

Security is the headline argument from issuers, and the data backs it up. In its 2025 payments fraud survey, the AFP (Association for Financial Professionals) measured fraud by channel: 63 % of companies were hit by check fraud in 2024, 38 % by wire fraud through Business Email Compromise (BEC), and only 5 % through virtual cards^[1]. The gap is not marginal. It is an order of magnitude.

The reasons are structural. First, a single-use number is already dead after the transaction: stolen afterward, it cannot be used again. Second, every virtual card is configured at creation (amount, currency, validity window, authorized merchant), making any unauthorized use nearly impossible beyond the defined scope. Third, the virtual number never exposes the underlying account details. The few fraud cases that do occur rarely involve the payment itself: they trace back to social engineering, where an employee is manipulated into authorizing a payment to a fake supplier^[1].

Virtual cards are not a universal solution. They shine in four specific contexts where per-transaction traceability and control deliver more value than the convenience of a physical card.

1. Marketing and media buying. This is the textbook case. An agency or growth team runs campaigns across multiple platforms: Google, Meta, LinkedIn. Instead of a single shared card (a reconciliation nightmare), they generate one number per campaign or even per client. Spend is automatically categorized: no manual matching, and any anomaly (a spike on a dormant campaign) is immediately visible. For media agencies, this has effectively become the standard.

2. Subscriptions and SaaS tools. Shadow IT is expensive: subscriptions taken out by individual teams, forgotten, quietly renewing for years. One virtual card per subscription fixes the problem at source: the limit is set to the subscription price, the card deactivates when the contract ends, and every renewal is visible. When a SaaS vendor quietly raises their price, the card declines: the alert is immediate, whereas a standard card would have let it through.

3. Supplier payments. Historically this is the territory of checks and wire transfers, the two most-defrauded channels^[1]. A single-use virtual card issued for a specific payment speeds up collection on the supplier side and eliminates the risk of intercepted banking details or stolen checks. Issuers targeting this segment highlight lower Days Sales Outstanding (DSO) and automated reconciliation, two benefits no wire transfer can match.

4. Business travel. Flights, hotels, trains, client dinners: one virtual card per trip, capped at the travel budget, closed out on return. Employees no longer need to front personal expenses, finance has real-time visibility on every spend, and there is no physical card to lose on the road. This is also one of the most thoroughly documented use cases in B2B virtual card literature.

Framed as an either/or question, this misses the point. Virtual cards do not replace physical cards. They complement them. A physical card remains essential anywhere payment requires the card to be physically present: a toll booth, a fuel station, a restaurant on a business trip, an ATM. Virtual cards excel at card-not-present scenarios: e-commerce, subscriptions, online supplier payments. Real-time controls apply to both: spending limits, instant blocking, per-transaction alerts.

In practice, the right model is coexistence: a physical card for field use (fuel, tolls, meals on the road), paired with virtual cards for online spending. This is exactly what a fuel card integrated into a broader corporate payment suite enables: one back-office for both, rather than two tools that never talk to each other.

One often-underestimated point: virtual cards lend themselves to real-time control far better than physical ones. Adjusting a limit on a physical card means contacting the issuer; on a virtual card, it takes seconds in the portal. For a finance team that needs to raise a limit for a trade show and close it back down the same evening, that difference is very real.

The B2B virtual card market has surged: virtual cards have become the dominant segment of global B2B payments by volume, and single-use transactions accounted for nearly 60 % of the market in 2024^[4]. Two families of providers share the space.

On one side, spend management platforms (Brex, Ramp, Spendesk's corporate card, Mooncard), which embed virtual cards within expense report and approval workflows. On the other, issuance infrastructure providers (Stripe Issuing being the leading example) that allow any company to create its own virtual cards via API. The networks (Visa, Mastercard) underpin everything and set the security baseline^[2]. Greenway operates in the first camp: a virtual corporate card integrated into a suite that also covers fuel, tolls, and EV charging, all managed from a single back-office, with 1 % of every transaction donated through the 1%ForAll® programme.

When choosing a solution, two criteria matter more than headline pricing: depth of integration (does the card connect with your accounting system, your fleet management tool, your expense reporting software?) and quality of real-time controls (per-transaction limits, remote blocking, alerts). A virtual card delivered without a capable back-office only delivers half the promise.

For a deeper look at integration logic and the broader role of the corporate card, our analysis on the corporate card and CSR and our overview of smart corporate payment cards complete the picture.