That single, solitary “M” on a wedding RSVP card has embarrassed and baffled more guests than any other rule of etiquette. It looks simple, but it causes many people to hesitate the moment they pick up a pen.
Some assume it means “maybe,” while others think it refers to meal choices or the number of guests. Uncertainty can turn a simple task into an awkward guessing game, especially when you don’t want to make a mistake.
