So... for the company form...
Posting to https://kiwioz.accelo.com/forms/public/company
I'm submitting contact_firstname, contact_surname, company_name and affiliation_email and those are all coming through properly.
For the attachment, I'm using "filepath_attachment_TEST" = "Interviews" and "attachment_TEST" = {Actual File}.
Interviews is the folder on the company record that I want to upload it to and TEST is the name I'm using for the file name.
What am I doing wrong here?