What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
You can further secure using encryption by using its secure URL and SSL submssion.
Check this user guide for more details
User Guide: -How-can-I-receive-SSL-Submissions
On another note, if your objective is to use the form to just ask users/people for their Credit Card information -- it will not work.
This is the mentioned part about Phishing in the terms
Phishing You agree that Company may terminate your JotForm Service immediately if a form is created or JotForm is found to be used to: Obtain credit cards sensitive information, show content with child pornography, make login forms to steal user credentials. All these activities are considered as Phishing and any account along with the guilty forms will be suspended immediately
There is a higher chance that your form and account might be suspended by the anti-phishing filter if it detects such type of form in used.
Hope this help. Inform us if you need further assistance.
I suggest you use also instead the Payment tools (like Paypal Pro) if you need to use Credit Card details into your form.
You can review this guide
The guide that you provided was highly helpful for me also. I hope Venya01 has also got his issue resolved. Thanks for supporting!