allan:
Large companies who only provide a web form for you to contact them in writing - require an email address as part of the form completion, but do not email you back your web form submission. This is not hard to do! But does make it very easy to deny that you ever sent them anything in the first place.
Ugh, had that problem with Veteran's Affairs, checked the "I require a reply" box on the web form but never got one. So, did they not get the message, did they get it but ignore it, did it get lost in the paperwork, did they get it, act on it, and send a reply but I didn't get it, ...? It's the UDP of communications methods, just a one-way black hole.