What fields would i use to take credit card information offline?

Hello 😊 You won't be able to use JotForm offline, a user/respondent would need an internet connection to submit a form. And I'm afraid you can't collect credit card information either at all, regardless of what the reason may be. It will go against our Terms of Use.

A snippet from our Terms of Use page:

Phishing. You agree that Company may terminate your JotForm Service immediately if a form's purpose is found to be deceptively obtaining: sensitive credit card information, social security numbers, user login credentials, or other sensitive personal information. All these activities are considered as Phishing and any account along with the violating forms will be suspended immediately.

Collecting Sensitive Information. You may not use the JotForm to collect certain types of sensitive information, including but not limited to credit card information and any type of login credentials. You may collect some sensitive information such as social security numbers or driver’s license numbers, but you are required to use best security practices of JotForm including SSL and Encrypted Forms features. You are solely responsible for compliance with any data protection and privacy laws and rules applicable to the sensitive information.

Be advised that you should use one of our Payment Processors if you wish to process payments on your form.

Here's a complete list of all payment processors we integrate with: https://apps.jotform.com/category/payment_processing

If all you need is some sort of Payment Authorization (e.g. you wouldn't want to charge your users or wanted to charge them at a later date), then your choices would be limited to Stripe, Paypal or Authorize.net.

Complete guide: How-to-Enable-Payment-Authorization 

In case you're not sure which one will work for you, I recommend reading this article: Which-Payment-Processor-is-Right-for-Your-Business