can i put in a field that is hidden from customer but I can use

many printed forms have a section that says: FOR OFFICE USE ONLY and the section is used for the people in the office who receive the form and need to notate it.

Can I add a hidden field to my form which cannot be seen and/or not be modified by the person filling out the form, but it is then included in the submission and I can populate it?

For example - I use a form to generate leads.  I ask for dates and email address, etc.  but then I want to put in some notes after I speak with the client...like even a simple Yes/No - client wants to purchase or doesn't.  I want to look at the entry and edit a field so I can put YES or NO in it....or whatever other word(s) I decide are relevant

does this make sense?  how can I do that?

Yes. It is possible to have some fields hidden and can be displayed for your internal purpose. These fields can be shown based on a condition set such as a secret code which is available with you.

Please see the form below that I modified with the clone of your JotForm.

http://form.jotformpro.com/form/50774671321959?

Additionally, you can just place an edit link in the notification email so that you can access the particular submission to edit it just by clicking on the link.

Hope it works for you. Please feel free to clone this JotForm to your account to see how it works. Do get back to us if you need any further assistance. We will be happy to help.

Thanks!