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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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Deleting cards from Balanced via Ruby gem

I'm marking cards as invalid by doing a PUT request with the is_valid parameter being set to false. Is is_valid ever set server side such as in the case of a card being declined by the processor? If Balanced sets is_valid to false will this be a…
David G
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How display last 4digits from credit card number

I need to present, for user, last 4 digits of credit card attached to our system (as skype does for example). It should look like: We will charge your card xxx-xxx-xxxx-1234 For authorizing and charging CD we use some 'Payment Gateway'.…
mrok
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process credit cards without using a gateway

Is it possible to take online payments without using a payment gateway or a third party checkout like google checkout, and how? The point is to avoid the fees of payment gateways.
John Smith
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Payment Gateway using cURL with SSL?

I am processing credit cards using a payment gateway. To POST the data to their servers, I am using cURL in PHP. I have an SSL certificate issued to my domain, to ensure all POST'ed data is encrypted. Because the SSL certificate is already…
john
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3 answers

Is billing address required for Paypal direct payment (credit card)

when user do a direct payment(buy as guest - pay by credit card), by default,user need to fill up credit card billing address and phone number before going to credit card number, csc etc. Actually i don't really want the billing address, can i…
Mario
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Paypal - can i skip billing address & phone number info for credit card payment?

i'm integrating paypal digital goods payment with my website. When user do a direct payment(buy as guest - pay by credit card), by default,user need to fill up credit card billing address and phone number before going to credit card number, csc…
Mario
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Allowing credit card payment services inside iFrame apps

I'm wondering what the policy for providing credit card payments are inside of iFramed apps. I understand that this is against the rules and that Facebook asks for credits to be used, but there are examples out there of iFramed ecommerce sites using…
Andrew Tweedie
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High-load payment processing architecture in PHP

Imagine a local Groupon clone. Now imagine a deal that attracted 10x normal visitors and because visitors were trying to buy deal in parallel MySQL database went down and deal's maximum purchases limit was exceeded. I'm looking for best practices…
Otar
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Make payments without using third party gateways

I want to process electronic payments. I am currently using PayPal but it costs too much. Many companies are able to provide electronic payments without using gateways. I imagine they use banks web service directly. How does it work? Should the…
Matroska
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How to create random honeypot credit card data

So I'd like to create some honeypot credit card data. Creating the credit card numbers is easy (maybe). I can just create numeric integer values in a certain range. If I'm ambitious, I might try to create Luhn valid numbers, though I probably…
Kzqai
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How can I read the purse balance with an EMV CARD?

I'm working with a smart card reader and I'm finding some trouble about getting the purse balance from an EMV card. I have developed software for other cards with t=0, protocol, but this time this process is killing me. I supposse it has to be…
Pablo Aparicio
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IOS app for a website

I'm starting making an app for a website that I own. I know some about programming with xcode but there's a lot of stuff that I don't know yet. Mostly I have almost everything figured out for the app but I need to add to the app a way to sign in and…
emiliomarin
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how to get card information after swapping in android

I am working on an application where we are providing user a way to pay bill through credit card but I don't have any idea how/which api should I use to get information of card swapped in android. Please help. Thank You
Sandip Jadhav
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Persist non-model info on an MVC form

I have an MVC form that contains some fields that are not related to my model. Those fields contain user-supplied Credit Card information. Once the user fills-out the form and clicks Continue, I perform some credit-card validation in my…
WEFX
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Random Duplicate Transactions in Authorize.Net

Having an emergency situation. Currently on my site I have some customers that are being charged multiple times for the same order. The payment gateway is Authorize.Net and the store front platform is Magento Enterprise. What could be causing this?…
Eric Shepherd
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