When receiving a wedding invitation or another formal event invitation, you may notice an RSVP card with a line beginning with the letter “M.” Although it may seem confusing, the meaning is simple. The letter is the beginning of a courtesy title, such as Mr., Mrs., Ms., or Miss.

Traditionally, guests complete the line by adding their preferred title followed by their name. For example, someone might write “Mr. John Smith” or “Ms. Sarah Johnson.” The letter “M” is provided as a starting point, not as a question that requires a particular answer.

The tradition comes from older invitation etiquette, when formal titles were commonly used to address guests. Today, invitations are often more modern and flexible, but the “M” format remains popular on traditional RSVP cards.

If you do not use a formal title or prefer not to include one, you can simply write your name. The purpose of the line is to identify who is responding, not to make guests choose a specific form of address. As the article explains, “The purpose of the line is to make it clear who is responding, not to make guests choose a particular form of address.”

An RSVP card is mainly used to confirm attendance and may also include questions about meal preferences or dietary requirements. When responding, clearly write the names of the invited guests, indicate whether you will attend, and provide any additional information requested by the host. Ultimately, the mysterious “M” is simply a traditional abbreviation for a courtesy title, making it easier to address guests properly.