Embarrasing mistakes

OK, one more from the advertising/marketing perspective.

I once worked at a pharmacy benefit manager, that regularly sent out letters to their "members" about different aspects of the benefit. These letters were highly regulated. We had writers, editors, and managers all looking at them. In addition there was a team of medical, legal, and sales people who reviewed and approved the letters before they went out. Needless to say there were mistakes.

The best one was when a letter went out with a toll-free number for members to call if they had any further questions. Only on this particular letter, the toll-free number was not toll-free. And the questions members got answers to were probably not the ones they called with. Somewhere along the line an 876 prefix got switched to a 976 prefix.