Q&A: Invitations: Addressing Couple With Different Last Names?
How should I address an invitation to a married couple if the wife has kept her maiden name both socially and professionally?
Address the invitation the same way you would address one to a couple who is living together but not married (in other words, any couple with different last names). Names are listed alphabetically, no matter which person (woman or man) comes first. The outer envelope should look like this:
Ms. Samantha Adams
Mr. Thomas Sullivan
12345 First Street
Anywhere, USA 11234
The inner envelope would read:
Ms. Adams and Mr. Sullivan