Credit card fillable form?

It is against our terms of use to collect credit card info on plain text fields. 

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, get social security numbers, show content with child pornography. Or if a form was made to steal user login credentials. All these activities are considered as Phishing and any account along with the guilty forms will be suspended immediately.

Card number, expiration date, security codes and card holder name are considered critical information and cannot be collected on plain text fields. The only services allowed to collect such data are those that are DSS/PCI certified.

If you want to have payment fields inside of your form you have to use one of JotForm payment tools. 

Inside of this articles you can find out more about payment tools and how to set payment form:

http://www.jotform.com/help/47-Order-Form-Basics 

http://apps.jotform.com/category/payment_processing 

http://www.jotform.com/help/165-Setting-Up-Your-First-Order-Form 

If you want to charge your users manually at later date, I would suggest you to use on of payment tools that has built in credit card fields like PayPal Pro, Stripe, Authorize.net, Dwolla.

How to Enable Payment Authorization

In case that your question was related to credit card fields inside of Fillable PDF form, please note that payment fields will not be shown inside of Fillable PDF forms.

Fillable PDF - Everything you need to know about JotForm Fillable PDF Creator

If I did not understood your question correctly, please explain in more details what you are trying to achieve.

Hope this will help. Let us know if you need further assistance.