You would address them as Mr.and Mrs.Smith
For the salutation you would write: Dear Mr. (or Mrs. or Ms.) Smith On the envelope you would address it as: The Honorable John (or Jane) Smith American Consul General Address
I would address it John Smith and family
You would write it as: Mr. John Smith c/o, (address)
Yes, sir.
You would address for a Junior: Mr. & Mrs. John Jr., or, Mr. John Jr., and Mrs. Sarah Smith.
You would punctuate an address with a suite by writing it as: 123 Smith Rd., Suite A.
You would address the letter to John Smith III. This is the proper way to denote that he is the third person in his family line with the name John Smith.
To address a man and wife when he is a Jr would be:Mr. and Mrs. Mitchell O. Smith, Jr.When wife's name is unknown:Mitchell O. Smith, Jr. and wifeInformal:Mary and Mitchell Smith
That is her personal information. Why would you even ask this?
Cathy can not be described as nonexistent.
dr Mary smith would be the correct way
Say there last name was "Smith" you would write Mr. and Mrs. Smith.