The MM AA code printed on a credit card corresponds to its expiration date in month/year format. MM denotes the month (from 01 to 12), and AA represents the last two digits of the year. A card displaying 09/27 remains usable until the last day of September 2027, after which it is automatically deactivated by the issuer.
Where to find the MM AA date on a credit card
On most Visa and Mastercard cards issued in France, the expiration date is located on the front, below the 16-digit number. It is often preceded by the mention “VALID THRU” or “EXPIRE FIN”.
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The location is not universal. Some issuers now place the date on the back, next to the visual cryptogram. Some banks go even further with “no visible data” cards: the number, date, and verification code no longer appear on the plastic and can only be accessed through the mobile app. This trend aims to limit the exposure of sensitive information in case of theft or photographing the card.
To find out what mm aa means on a credit card and how to enter it correctly during a purchase, you first need to locate this date on your own card, as its position varies by bank and issuing country.
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MM AA format and variations in online payment forms
When making an online payment, the field for the expiration date can take several forms depending on the merchant site or payment gateway used.
- MM/AA: the most common format in France, with two digits for the month and two for the year (example: 03/28).
- MM/AAAA: some forms require the full year in four digits (example: 03/2028). The principle remains the same.
- MM-YY: this English notation appears on international sites. “YY” corresponds to “AA” in French.
- Two separate fields: a dropdown menu for the month and another for the year. No manual entry, which reduces errors.
A common mistake is to reverse the month and year. If your card expires in March 2028, entering 28/03 instead of 03/28 will result in an immediate transaction denial. The month is always entered first, regardless of the displayed format.
Card expiration: what changes between physical support, digital card, and recurring payments
When the MM AA date has passed, the physical card stops working both in-store and online. The payment terminal or merchant site checks the expiration date and blocks the transaction if it has expired. Until then, the logic is simple.
The situation becomes more complicated with other uses related to the same card.
Virtual or tokenized card
If you use Apple Pay, Google Pay, or a virtual card generated by your banking app, the payment token may have its own expiration date, distinct from that of the plastic card. When your physical card is renewed, the token is sometimes updated automatically by the network (Visa or Mastercard) without your intervention. Sometimes, you need to remove the old card from the digital wallet and add the new one manually.
Recurring payments and subscriptions
Subscriptions (streaming, insurance, phone plan) pose a specific problem. The debit is linked to the data of the registered card, expiration date included. When the card expires, two scenarios coexist:
- The banking network automatically transmits the new details to the merchant via an update service (Visa Account Updater, Mastercard Automatic Billing Updater). The debit continues without interruption.
- The merchant is not connected to this service. The payment fails and the subscription is suspended until the new expiration date and new cryptogram are entered manually.
No visible indicator allows you to know in advance which subscriptions will be updated automatically and which will require intervention. Anticipating renewal by listing your active debits remains the only reliable strategy.
Automatic renewal by the bank
Most French banks send a new card a few weeks before the expiration date, without any action from the cardholder. The 16-digit number may change or remain the same depending on the institution, but the expiration date and the cryptogram are always different. Some banking apps send a notification several months before expiration to allow the cardholder to confirm their delivery address.
If you have not received your new card as the deadline approaches, contacting your bank quickly prevents you from being left without an active payment method.
Expiration date and card transaction security
The MM AA date is part of the trio of information requested for any remote payment: card number, expiration date, visual cryptogram (CVV/CVC). It does not constitute a security mechanism on its own, but its role is twofold.
First, it verifies that the card is still valid. Then, it contributes to the consistency of the data transmitted to the banking network. An incorrect date, even by just one month, is enough to block the transaction before any further verification (3D Secure, SMS code).
Regularly renewing the card limits the exploitation window in case of data leaks. A stolen card number with a near expiration date has less value for a fraudster than a valid number still usable for several years. This is one of the reasons why banks set a limited validity period, usually a few years.
For online purchases, opting for a virtual one-time-use card or one with a low limit remains a more effective protection than relying solely on the expiration date. These cards, available in most banking apps, generate a temporary number, date, and cryptogram that become unusable after the transaction.
The MM AA expiration date may seem trivial, but it conditions the functioning of the entire payment ecosystem linked to a card. Checking its location on your card, anticipating the renewal of your recurring subscriptions, and monitoring the receipt of your new card before the deadline are three reflexes that prevent most blockages.