Device fingerprinting

---
tags: [prevent]
---

<img src="https://files.readme.io/cc6a349-tour_devicefingerprinting_icon.png" alt="Device Fingerprinting icon" align="left"> Device fingerprinting is one of the fraud prevention tools. You use this tool to help detect fraudulent behavior.

Generally, you use a device fingerprint for the first transaction with a card. Openpay **requires** a new device fingerprint to be created with every transaction (included by default with the Nexio iframe), while it is **strongly recommended** for Kount. For information about device fingerprinting requirements, see the gateway-specific information for the [Connections](doc:connections) you use.

This section contains the following topics for ways of using device fingerprinting:

* [Using device fingerprinting in the save card flow with an iframe](doc:using-device-fingerprinting-in-the-save-card-flow-with-an-iframe) 
* [Using device fingerprinting in the save card flow with your own form](doc:using-device-fingerprinting-in-the-save-card-flow-with-your-own-form) 
* [Using device fingerprinting in the run transaction flow with an iframe](doc:using-device-fingerprinting-in-the-run-transaction-flow-with-an-iframe) 
* [Using device fingerprinting in the run transaction flow with your own form](doc:using-device-fingerprinting-in-the-run-transaction-flow-with-your-own-form)

> 📘 Note
>
> If you do not want to use a device fingerprint when using the iframe, set the `processingOptions.shouldUseFingerprint` parameter to `false` in the one-time-use token request.