> For the complete documentation index, see [llms.txt](https://help.checkoutchamp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.checkoutchamp.com/funnel-builder/creating-and-editing-funnels-pages/funnel-visualizer-and-page-builder/page-builder-2.0/page-building-tips/credit-card-security.md).

# Credit Card Security

The credit card inputs on a live Checkout Champ checkout page are displayed inside an iframe for maximum security.  The entered values are securely passed to our servers when the checkout page is submitted.  This includes card number, expiration date, card month, card year, and card security code (cvv/cvc).

Please consider the following tips for building pages that are compatible with the iframe.  The iframe is not visible within the page builder, so careful consideration is needed.

* Javascript is unable to access the card inputs on the live page
* Links are not allowed inside the card inputs
* Ensure input styling is added using CSS, not Javascript
* The card inputs must be enclosed in a parent element

<figure><img src="/files/nm1C1yspziYOagZmFvrL" alt=""><figcaption></figcaption></figure>


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