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.
Are you referring to your JotForm titled "PeeWee Contact Form"? As I check your JotForm, the captcha field seems to be displaying properly.
If you are referring to something different, please let us know. We will be happy to assist you.
That is the one I was referring to, but I decided to delete Captcha because
I found a post that said you have other ways of stopping spammers and only
offered Captcha because people requested it.
Is this the case? Or is Captcha really necessary to stop spammers from
hijacking a form?
A CAPTCHA (an acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart") is a type of challenge-response test used in computing to determine whether or not the user is human.
You can also prevent duplicate submissions. You can take advantage of our unique submission feature to block multiple submissions from one system of one IP address by setting the "Loose check" or "Strict Check" respectively. Here is a guide to help you set unique submission in your form: http://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form
You can also use our unique question feature to prevent from submitting duplicate submissions. Example: You can set one of your forms question (like cell number or email address) to be a unique question. This will not allow a user to use the same cell number or email address to submit your form. Here is a guide to help you: http://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question
Hope this will help. Let us know if you need further assistance.