Depending on the culture, it could be written as Sres. or Sr. y Sra.
A correct way to address an envelope to Spain is: Senor (Mr.) Senora (Mrs.) or Senorita (Miss.)
* Dr. & Mrs. John Doe
You can use Mrs., Miss, or Ms., depending on the marital status and preference of the woman.
Dear Mr. (name) and Mrs (name)
"The Rev. and Mrs. (his first and last name)" would be the correct way to address an envelope to a pastor and his wife.
Colonel and Mrs. Smith When formally addressing an envelope the male always takes precedence. If the wife were a colonel you would address it as Mr. and Colonel Smith.
On an envelope it should be written as Mrs. & Mr. the reason Mrs comes before is to gesture respect for your own spouse. What in Gods' name are you talking about? The correct response is Mr. then Mrs., and the reason is deference to the man of the house. Political correctness plays no part here.
Mr. & Mrs. <lastname>
"Mr. & Mrs. C. Smith" if you know his first initial. If not, then "Mr. & Mrs. Smith" would be correct.
When addressing an envelope to the wife of a doctor who is not a doctor herself then and he is Dr. John Doe, then address the envelope to her as Mrs. John Doe or Ms. (Mrs.) Jane Doe.
m.et mme smith
Dr. & Mrs. John Smith