Please do not write below the line

Truly a perfect mystery. Perhaps at one point letters were expected to be returned, and this feature of the letterhead has been copied over the years without thinking?

The OCR statement is confusing. It speaks of a customer manager trying to pass the buck down the line as quickly as possible

my thought was that they perhaps have to accept returned letters informing them of the lack of a TV at the address, but in a sort of dark pattern they don't specifically say that in the hope that you use one of the other, less administratively expensive options listed in the letter.