We are currently writing up Christmas cards to Clients. In a situation where the client is a couple (unsure if married or not) what is the correct way in which to address the envelope? I understand the old fashion way is to address the envelope to the man of the house, but what is now normally accepted?
John Smith and Mary Brown (addressed to each one since they have different last names)
Mr and Mrs. John Smith (traditional way, if they are married and both are your clients)
John Smith and Mary Brown-Smith (if professionally using separate names)