When a customer enters a 12 digits cardNumber, despite this number of digits not being valid, we send it several times to the acquirer even knowing that he will not approve since the cardNumber is not in the pattern: [0-9]{13,19}. The result is a stuck order for several days until being canceled.

1. Go the checkout of an Argentina store
2. Fill in a Mastercard 12 digits random cardNumber
3. Click on "SÍ, EL NÚMERO DE LA TARJETA DE CRÉDITO ES CORRECTO"

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