Post # 1
Ok, I am a little confused about this. Say I work with a Jane Smith and I want to invite her and her husband to my wedding. Would I address the invitation to Mr. & Mrs. John Smith even though the wife is the one I am inviting and the husband is her date or guest? Or would I address it Mrs. Jane Smith & Guest?
Post # 3
I would address it to Mr. & Mrs. John Smith, since they are a married couple. If you put “and guest”, that implies she is single and is free to bring whoever she wants.
Post # 4
If I only knew one person in the couple but also invited their spouse I addressed it as “Mrs. Jane Smith and Mr. John Smith”
Post # 5
I put Mr. and Mrs. John and Jane Smith