Can I use Jotform to build a secure form to collect card authorizations from cllients?

You will have to use one of  our payment tools that has built in credit card fields like Paypal Pro, Stripe, Authorize.net.

Here is a guide:

How to Enable Payment Authorization

Inside of this guide you can find how to setup your order form:

Setting Up Your First Order Form

Do note that we do not allow collecting of credit card information in JotForm using the normal fields. You must use our Payment tools.

You may check our terms of use.

Let us know if you need further assistance.