I have a financial institution I do business with (name withheld to protect the share price) that moved from only accepting post and fax to also accepting email ‘scans’ (pdf, jpg) for most things. While most companies have long published fillable forms this one has all of their forms on their web site, locked tight so they cannot be altered OR FILLED IN via a pdf viewer, excepting with a pdf editor that can apply text over the pdf document itself*. While it is easier than trying to type in rectangular form fields with a typewriter (available from your local museum or collector) why make it hard?
Where is this going? Without a pdf editor, the only way to complete their forms is to print them, complete them with pen and scan/photo them back in. But they have moved on from only post and fax and are proud of it.
* if you have a resident script monkey no worries, but the comment is for the ordinary person who just wants to send them the completed form.