I am getting the error "The attached PDF file is not a PDF file. Please remove file, create PDF and reattach." for the SB0016 - provisional patent PDF form.
I downloaded the file from their own server here: https://www.uspto.gov/sites/default/files/documents/sb0016.pdf and then saved it to my mac - filled it out using the default mac osx program preview and get this error when uploading their file.
I am uploading to their 'unregistered' website here: https://efs.uspto.gov/EFSWebUIUnregistered/EFSWebUnregistered?ActionString=go
I get this error when uploading a completely blank and unedited version of their own PDF, and I get this error when I try to edit their PDF before uploading it.
does anyone know how to deal with this?