The salutation used for the envelope address can be either Dr. John Smith and Dr. Jane Smith, or Drs. John and Jane Smith. If you are writing a letter to both doctors, then he greeting in your letter can be Dear Drs. Smith.
Dr. and Mr. Smith
The Revds John and Mary Smith
Dear Mr. John and Rev. Sally Smith,
A letter would be addressed to Mr. and Doctor. If they are both Doctors it would be Doctor and Doctor.
This could be done in several ways. I believe the current best practice would be The Reverend and Mr. Smith.
The proper salutation for a husband and wife who are both pastors is Pastors John and Jane Jones. Letters can be addressed in the following format: Pastors John and Jane JonesWonderful ChurchAddress line 1Address line 2City, State, ZipDay, Date, YearDear Pastors John and Jane Jones:
Dear Doctors Jon and Michelle Smith
Mr. John Doe and Ms. Mary Smith
You could address it to Reverend and Reverend Smith. The alternative would be the Reverends Smith.
Assuming a business letter to husband and wife with different last names who you don't know the proper business salutation is to have the the wife's name first before the husband's accompanied by the proper titles. For example: Dear Mrs. Thompson and Mr. Jones, (salutation on letter) Mrs. Susan Thompson and Mr. Jeremy Jones (address on envelope and letter) Note that you could use "Ms." instead of "Mrs." if you prefer, although I recommend that since in this example you know they are married I would choose "Mrs." Jim Lumley jimlumley@live.com
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