# Reading contactless payment with Arduino

**URL:** <https://forum.arduino.cc/t/reading-contactless-payment-with-arduino/940510>\
**Category:** General Guidance\
**Created:** [December 28, 2021, 10:53pm UTC](https://forum.arduino.cc/t/reading-contactless-payment-with-arduino/940510 "2021-12-28T22:53:53Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Ilprofessore](https://avatars.discourse-cdn.com/v4/letter/i/b38774/32.png) [@Ilprofessore](https://forum.arduino.cc/u/Ilprofessore)\
**Post date:** [December 28, 2021, 10:53pm UTC](https://forum.arduino.cc/t/reading-contactless-payment-with-arduino/940510/1 "2021-12-28T22:53:53Z")

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Ok, I have seen the posts by a chap who wanted to use Arduino as a contactless payment system...... And, no, I do not want to do this.....

I have been playing with RFID and my laptop, with the aim of using it to unlock my office pc. I have had success with this, and it is really quite simple.

But I want to use a contactless payment card as the NFC tag. The reason for this is to ensure that I cannot be requested to leave a login card when I am away from the office. If it is my bank card I am using, then I have a justifyable reason not to leave it to allow others access to my PC.

This is due to some security concerns. Can this be done?

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**Author:** ![er\_name\_not\_found](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/er_name_not_found/32/647693_2.png) [@er\_name\_not\_found](https://forum.arduino.cc/u/er_name_not_found)\
**Post date:** [December 28, 2021, 11:13pm UTC](https://forum.arduino.cc/t/reading-contactless-payment-with-arduino/940510/2 "2021-12-28T23:13:49Z")

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Seems ill advised, especially if you store info from your bank card in an Arduino or on an office computer.  
Just use a separate NFC card and keep it in your wallet.

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**Author:** ![johnwasser](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/johnwasser/32/214270_2.png) [@johnwasser](https://forum.arduino.cc/u/johnwasser)\
**Post date:** [December 29, 2021, 2:18am UTC](https://forum.arduino.cc/t/reading-contactless-payment-with-arduino/940510/3 "2021-12-29T02:18:09Z")

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> [@er\_name\_not\_found](#):
>
> Just use a separate NFC card and keep it in your wallet.

And glue it to an old (non-NFC) bank card to make people THINK it is your bank card. 🙂

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**Author:** ![noiasca](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/noiasca/32/1126910_2.png) [@noiasca](https://forum.arduino.cc/u/noiasca)\
**Post date:** [December 29, 2021, 7:22pm UTC](https://forum.arduino.cc/t/reading-contactless-payment-with-arduino/940510/4 "2021-12-29T19:22:55Z")

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> [@Ilprofessore](#):
>
> Can this be done?

yes. Why do you think it can't be done?  
A bank card has a 7 byte UID like other nfc cards have. If you just rely on the UID of a NFC tag, you can rely on the UID of the bank card also.

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**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [June 27, 2022, 7:23pm UTC](https://forum.arduino.cc/t/reading-contactless-payment-with-arduino/940510/5 "2022-06-27T19:23:06Z")

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