Stripe Test Card Numbers: The Ultimate Buying Guide
Discover the best practices for using Stripe test card numbers to ensure a smooth and secure transaction process.
Our Cards
Choose from any of our gift cards to give to your loved ones
Choose from any of our gift cards to give to your loved ones
Redeem your gift cards at any of our Merchants
Onyx Gift Cards is a Grenadian company designed to introduce, market and manage gift cards systems in Grenada for retailers and corporations. We are enthusiastic about the effect and influence we will have on the local market. We intend to expand our systems regionally with a range of product offerings and services.
Gift cards are the preferred way of giving and receiving gifts. They carry a monetary value that can be redeemed for gifts at your favorite store.
Onyx GiftCards are “Open Gift Cards” which means that they can be redeemed at multiple merchant locations. They are standard credit card size, can fit into the average wallet and made of PVC plastic. Onyx GiftCards are Barcoded for security and safety for the consumer and bear a disclaimer at the back.
Onyx Giftcards can be bought with a branded Card backer which is black in colour and is designed to fit the card. There is an area to write a brief message to the recipient as well.
A Luhn check test is a checksum validation, not a legitimacy test. If you are evaluating a payment form, POS integration, or validation library, buy or build only a tool that runs the Luhn algorithm locally, logs no card data, and treats a pass as one signal among many. Never use a Luhn checker to test card numbers you do not own, and do not buy, sell, or trade CVV data. That activity is card fraud, and a Luhn pass does not make a card valid or authorized.
The Luhn algorithm, also called the mod 10 test, checks whether a sequence of digits has a valid check digit. It catches single digit typos and most adjacent transpositions. It does not verify that an account exists, that funds are available, that the CVV matches, or that the cardholder authorized a transaction. A number can pass Luhn and still be invalid, closed, stolen, or fabricated. A number can fail Luhn and still be a real identifier in rare cases where the issuer uses a nonstandard format, though major card networks use Luhn for primary account numbers.
If you are buying a validation component for a checkout flow, focus on data handling and scope. The cheapest or flashiest checker is not the right purchase if it transmits full card numbers to a third party. Prefer a tool that runs in your own environment, accepts test numbers only, and strips or masks inputs after validation.
Luhn itself has no tunable thresholds. The surrounding input rules do. Set length bands by brand and use the check digit as a format gate. For major networks, primary account numbers commonly fall between 12 and 19 digits, with most consumer cards at 16. Do not hard code a single length. Validate the issuer identification number range separately if you need brand detection. Reject empty strings, non-digits, and values outside your accepted length band before running Luhn. Keep CVV validation separate: a CVV is 3 or 4 digits depending on the network, and it must never be stored after authorization.
No. It proves the number's check digit is internally consistent. Authorization, account status, and CVV verification happen elsewhere.
No. Luhn applies to primary account numbers, not CVV values. CVV is verified by the issuer during authorization.
No. Buying or selling card data without authorization is fraud. Use official test numbers and a compliant payment processor instead.
Use the validation built into your PCI compliant payment processor or a well reviewed open source library that runs locally. Do not send full card data to a random checker site.