In order for fonts to be displayed correctly on someone else computer, the font has to either be installed on the computer or embedded into the PDF. Embedding the font into the PDF avoids having the user installing the font onto their computer. You can check that the fonts used in all form fields have been correctly embedded:
Even though you have embedded the fonts and set the form fields to use the font as described, some versions of Adobe Reader
on a Mac will revert to another font as soon as you start typing in an empty form field.
To avoid this set some initial text on all the form fields in the PDF. Many products use “Edit here” or give an example of what to type into the form field.
Opening the editable PDF directly from a browser will not work well. Most browser based PDF viewers will not know how to
display the form fields correctly.
Put some instructions in your product to first download the PDF to the computer and then to open the PDF in the latest version of Adobe Reader.