You may say to Signore & Signora or abbreviate it as Sr. & Sra.
The correct way to address an envelope to a married couple that have different last names is to use both of their names. For example, you could write Mr. Johnson and Miss or Ms. Dwyer.
Dear Mr. (name) and Mrs (name)
You can address it to only one, or address it to both using both names. Either way is acceptable.
* Senor & Senora ____________________. Senorita is single, Senora is married.
"Mr. & Mrs. C. Smith" if you know his first initial. If not, then "Mr. & Mrs. Smith" would be correct.
You can address it: John Doe and Jane Smith Street Address City, State, zip code
No, do not sent separate thank you notes and address the envelope and put both names of the married couple on the top of the card to thank them for the volunteering they did.
The envelope should read: Mr. John Doe & Dr. Jane Doe. If you don't know her first name then put: Mr. & Dr. John Doe.
An Frau und Herrn (name) or if they have a child/children An Fam. (name). Fam. stands for family.
Senior Doctor first if it is a medical reason or unmarried, Man first if it is a married couple.
The correct way to address the envelope is: Mr. John Doe & Dr. Jane Doe.
On the outer envelope it should read: PERSONAL Mr. & Mrs. John Doe c/o Zero Acme Co., 0000 Hawthorne St. San Francisco, CA ZIP CODE #