How can I make a form secure?

I want to make a form for entering credit card info that we will run manually with the info input on-line.

But the form needs to be secure.

Thanks.

Supposed you already have a form and you're about to embed it to your web page. 

Here's what you need to do, in order to make your Form secure.

However, please be advised that collecting credit card information using JotForm is strictly prohibited and this will violate JotForm's Terms of use. JotForm has an Anti-Phishing system that automatically detects forms used for phishing activities.