1. Visit site. Enter my email address and maybe client name. It gives me a unique URL (supportdetails.com/jasd9s89ajd698/ or optionally support.mybusiness.com/clientname).
2. I email that to the client and tell them to click the link. [Risk of training them to click strange links...]
3. They visit the page and get a Thanks message. It automatically sends me all the info I need.
Burden on the client is lowered. First time I saw this site or similar (been around for years) I wondered about quickly building an alternative that offered white labeling and the above process instead. Easy weekend project for someone, I imagine.