I am working with a client who does NOT want their users to be able to save their data. In other words, when the user opens the PDF file, they can enter data into the editable fields, but they should NOT be able to save that data as part of the PDF.
Does that make sense?
My client doesn't want the user to be able to save a local copy of the PDF with any of the data entered onto the form.
Based on what I've found in my research, as of Version 11, Adobe Reader now allows users to save their data. Unfortunately, my client doesn't want that.
If there are rules/regulations/laws in place that require something more certain, you'll have to take a different approach.