Wedding etiquette has changed considerably over the years.

Modern couples often prefer straightforward wording because they don’t want their guests wondering what a mysterious M means.

Instead of:

M __________________

they may use:

Name: __________________

or:

Names of guests attending: __________________

Digital RSVP systems have made this even simpler.

A guest can enter their name, indicate whether they are attending, choose a meal, and provide any necessary information without having to understand traditional stationery conventions.

Still, the old M line continues to appear on many formal wedding response cards.

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Final Answer

So, if you receive a wedding RSVP card with:

M __________________________

you now know what it means.

The “M” is the first letter of a courtesy title, traditionally Mr., Mrs., Ms., or Miss.

Complete the title and write your name.

For example:

M + r. John Smith → Mr. John Smith

or:

M + s. Sarah Smith → Ms. Sarah Smith

If you’re responding for a couple, list both names. If you don’t use a traditional title, simply write your name clearly or use the title you actually prefer. And if your title doesn’t begin with M, such as Dr., you can simply write it normally.

It’s one of those tiny wedding traditions that looks confusing until someone explains it.

Once you know the secret, that mysterious M is actually pretty simple.