Have you ever received a wedding invitation and wondered why the RSVP card has a line beginning with the letter “M”? This small detail is a traditional part of formal invitation etiquette, and its meaning is simpler than you might think. The “M” stands for the beginning of a courtesy title used when addressing a guest.

Traditionally, guests complete the line by writing a title such as “Mr.,” “Mrs.,” “Ms.,” or “Miss,” followed by their name. The letter is not related to meal preferences or another question. It comes from older formal customs, when courtesy titles were commonly used on invitations. Today, many hosts choose simpler formats, such as “Name” or “Guest Name,” to make responding easier and more inclusive.

If you receive an RSVP card with this traditional format, you can write your preferred title or simply provide your name, depending on the instructions. Remember to confirm whether you will attend, identify the invited guests, and answer any questions about meals or dietary preferences. Ultimately, the little “M” is just a tradition designed to help hosts identify their guests and receive clear, respectful responses.