- margo wheelerAsked on November 14, 2013 at 06:51 AMPage URL:
- JotForm Supportashwin_dAnswered on November 14, 2013 at 07:23 AM
Please be noted that having captcha fields in your from will be effective if there is a automated attempt to send spam submissions. It cannot prevent, if there is a human attempt to do so.
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: 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 wiill 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 helps.
Do get back to us if you have any question. We are happy to help.