Conditional and Required Fields

First, read the bit on Form Level Validation here:

https://www.pdfscripting.com/public/Form-Data-Validation.cfm

Then lets us know exactly how you'd like the form to work when the required fields aren't filled in.

HI,

This is possible but would require some JavaScript to be run as you have a choice between which fields they have to fill in, but you would have to control it all yourself, as you can just set fields to "Required" but this means they cannot be left blank.

So on your commit ( assuming you have followed the advice already given and are submitting the form) you would have to run a script to check the value of the field, and then check if your conditions are met, if they aren't then display something to the user, and if they are submit the form.

Otherwise the best you could hope for it to guide the user through alerts or showing and hiding of fields they need to fill in.

What do you mean by "require the user"? Do you mean you want to set the fields as Required? Do you know that's only enforced if the file is submitted?