http://nationbuilder.com/donations_api The Donations API description of the is_private field reads "false if the donation should not be posted publicly on the site". Is this correct? If is_private == false, then the donation is private; and if is_private == true, then the donation isn't private?
I can definitely see why that language has caused confusion. The "is_private" field relates to a check box in the nation called "Don't post this publicly on the site" so when marking "is_private" as false you're unchecking that box meaning you do want the donation to display. Setting to true checks the box meaning you do not want it to display. I've updated the section in http://nationbuilder.com/donations_api