Stack Overflow
Stack Overflow

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
6
votes
3 answers

Angular: How to do Credit Card Input?

I want to keep input Capacity to 16 numbers and insert space between each set of 4 numbers. I did a deep search for a input for credit cards that allow user to insert 16 digits and enter a " - " or space between number but all result are for…
devmrh
  • 1,171
  • 4
  • 19
  • 46
6
votes
2 answers

ActiveMerchant: How to authorise cards when using gateways that do not support the void operation?

I am working on the billing component of a Ruby on Rails application using ActiveMerchant. The payment gateway we have chosen is PaymentExpress. Code examples I am seeing such as the one below, use authorize() and void() to test the validity of a…
Bo Jeanes
  • 6,294
  • 4
  • 42
  • 39
6
votes
3 answers

Is there free credit card api or payment gateway?

Actualy question says all, I need this only for testing. So, demo of some kind or 4-5 free transactions a day will do a trick. Not looking for anything fancy. Is there anything free?
shake
  • 323
  • 9
  • 23
6
votes
2 answers

What is the easiest way to get track data off a simple USB HID magnetic card reader?

I need to get Track 1 and Track 2 data off magnetic cards and send them over the network to a waiting server. What is an easy way to get the track data from a USB HID magnetic card reader? In case it helps, I have a MAGTEK Mini Swipe Magnetic Strip…
BuyTheBid
  • 277
  • 1
  • 3
  • 11
6
votes
1 answer

Testing IAP edge cases in iOS (eg: missing credit card info, etc.)

We currently have an app in the app store that uses IAP to disable ads and add a few features. However, we've noticed that some users have problems buying the IAP. After scrutiny it seems most of it comes down to not having an active internet…
Freek Sanders
  • 1,187
  • 10
  • 26
6
votes
1 answer

How to getting started with magnetic stripe cards?

I am newbie in the field of Magnetic-Stripe cards. But if I don't have any idea about the structure of these kind of cards, I can't develop software for them also. Searching a lot, gave me this information only : This cards have 3 different Tracks…
Ebrahim Ghasemi
  • 5,850
  • 10
  • 52
  • 113
6
votes
2 answers

How to prevent the credit-card number field being cached by the browser

I have an input field on a webpage that contains a credit-card number. What is the best way of preventing the browser from caching this value? Any solution needs to work on a large selection of browsers.
Simon Johnson
  • 7,802
  • 5
  • 37
  • 49
6
votes
0 answers

Spree Payment methods gives errors with nitrous

Need help from someone a little more familiar with Spree and/or Nitrous than I am. I recently moved my work on a Spree store site from my mac (which died) onto a PC through Nitrous (I obtained the files I'd committed to Github). After a slew of new…
Gogglor
  • 115
  • 7
6
votes
0 answers

Validate credit card number using luhn algorithm

I have a question regarding the following programming assignment. Credit card numbers follow certain patterns. A credit card must have between 13 and 16 digits. It must start with: • 4 for Visa cards • 5 for Master cards • 37 for American…
user3126388
  • 171
  • 2
  • 2
  • 5
6
votes
9 answers

Whats the best way to offer credit card payment on your website?

I want to offer credit card payment on my website and was wondering whats the best (or prefered) way to do so? I know I could use Google checkout, paypal, etc. but this is not what i am looking for. I am looking for a simple basic CC payment which…
Michal
  • 3,141
  • 5
  • 27
  • 29
6
votes
4 answers

Credit Card processing without Google Checkout / Amazon / Paypal

If I would like to process payments directly without going through Google / Amazon / Paypal, how would I go about that? Is there a Java API or some reference implementation that shows how to do such a thing or is it really that large and…
Walter White
6
votes
2 answers

EMV: Get the CVV code from an ICC?

I'm testing an EMV card reader, and I've done the steps indicated here here and here but I can't find a way to know if it's possible or not to get the Card Verification Value (CVV) code that I might need to contact the Merchant Server. Does somebody…
NovaOverflow
  • 235
  • 2
  • 8
6
votes
11 answers

What is the best way to determine duplicate credit card numbers without storing them?

I run a website where we mark certain accounts as scammers, and "flag" their account and all credit cards used as being bad. We don't store actual credit card values, but are storing a checksum/MD5 algorithm of it instead. We are hitting…
TheSoftwareJedi
  • 34,421
  • 21
  • 109
  • 151
6
votes
3 answers

Is it secure to POST Credit Card data from View to Controller?

Need to submit some CC data from the View to the Controller where it will be processed, can I just POST it or is there some common way of securing the data in transit?
MetaGuru
  • 42,847
  • 67
  • 188
  • 294
6
votes
2 answers

Decode audio from a credit card reader

I got a credit card reader that plugs into the microphone jack from my bank, and they provide apps for android and MacOS to receive payments this way. I don’t have any of these systems nor the need to accept payments, but I am curious about the…
Joachim Breitner
  • 25,395
  • 6
  • 78
  • 139
1 2 3
…
79 80