How do you address an envelope to a same sex couple?

Answer 1

Since this is a relatively new concept, it may be difficult to try to apply traditional rules, but here are some suggestions:

Same Last Name

1. Generally you would leave off the titles: John & Bill Smith.
   
2. If you feel the need to use titles, you could say Messrs. John & Bill Smith, but this might sound forced or archaic.
   
3. Most authorities would advise against saying "Mr. & Mr. Smith" though this format does occur regularly as well.
   

Different Last Names

Mr. John Smith & Mr. Bill Jones

Mr. Smith & Mr. Jones

John Smith & Bill Jones