I heard this on Radio 2 the other day. Chap had to buy a get well card and a retirement card for two friends. Unfortunately he mixed the two up and was very embarrassed to visit his friend in hospital for him to open a card that say "Sorry you are leaving us".
The planograms used by the card manufacturers cover 'Miscellaneous' genre which is everything from sorry you're leaving, new home and new job, to get well and sympathy.