Can i require people to fill in a certain value?

Hi,

Yes, using conditional logic with our forms you can indeed require a certain value to be entered in a field:

http://www.jotform.com/help/57-Smart-Forms-Using-Conditional-Logic

For example, I created a test form that will not show the submit button unless "123" is entereed in the text box.  Here is that test form:

http://form.jotformpro.com/form/42234378675967?

Please let us know if you have any further questions and we will be happy to help.

Thank you for using JotForm!