Correspondence between the author and BBC (“TVL”) staff, about why “please do not write below this line” is on the letters, makes for an amusing read: http://ww

Correspondence between the author and BBC (“TVL”) staff, about why “please do not write below this line” is on the letters, makes for an amusing read: http://www.bbctvlicence.com/Please%20do%20not%20write%20below%20the%20line.htm http://www.bbctvlicence.com/Please%20do%20not%20write%20belo... Presumably it’s there to invoke a sense of authority? I’d bet they split-tested this and found that it makes people more likely to pay up.