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Questions tagged [credit-card]

is used for questions related to payment cards. Questions regarding security of payment card data may want to consider using the pci-dss tag.

This tag is used with questions related to payment cards.

If your question is regarding security of payment card data, then you may want to consider using the tag.

Note that much of the advice surrounding this topic is region dependent, so it will help if you mention where in the world you are.

FAQs for this tag:
Which payment gateway should I choose

Terminology associated with this tag:
Merchant
Payment Gateway / Service Provider
PCI-DSS

1191 questions
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Most secure way to process credit cards

I am implementing credit card processing on my site and I am using a HTML form and processing the cards. I have only tested this for now. if some one view the source they can view the action page. is there a way i can avoid this. is there a way to…
CyberKANI
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Total paid function

I have this code: balance = 4213 annualInterestRate = 0.2 monthlyPaymentRate = 0.04 monthly_interest_rate = annualInterestRate / 12.0 for counter in range(1, 12): payment = monthlyPaymentRate * balance monthly_unpaid_balance = balance -…
Oleksandr Firsov
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how find a valid credit card Specifications?

i'm from iran and here we couldn't buy any credit card. for signup to many of sites we need a credit card Specifications such as credit card number, cvv2 and expire date. some sites generates fake creditcard. but Specifications of non of them dont…
saeid ezzati
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Credit Card Long/String Validation

I am working on a Credit Card Number validation application. I can enter in either a valid number or invalid but the output never takes data in and reads it as valid. I'm trying to figure out what is the right algorithm for validation of credit…
Rob Nelson
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1 answer

Set and compare dates to check credit card validity

I have customers signing up for a 12 monthly installment option. I need to know if their credit card will be valid for at least the duration of the installment option exactly 12 months. Using the card.exp_year and card.exp_month from the object…
alemac852
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How to mask first two letter and last four letters of credit card number

How to mask first two letter and last four letters of credit card number. I am able to do the last four digits but the first two digits I can't. I am using following code: string result = s.Substring(s.Length - 4).PadLeft(4, '*'); Please let me…
Kokirala Sudheer
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