One way to dramatically lower customer complaints
A florist dropped off a few dozen flowers at my house. The card had our name on it, but nothing was printed, there was no way to tell which florist brought them by.
I can just see the discussion at headquarters. "We've been getting way too many customer complaints. People get the flowers and they're not happy with them, so they call and want a refund or replacement. It takes a lot of time and hassle."
"I know! Let's just take our name and phone number off the card."
Sort of like having heavier than usual call volume, or hiding your contact info somewhere deep on your website.