You would say Dr. Last Name. For example, John Doe, Ph.D., would be called Dr. Doe.
You can address a person with a Ph.D. as "Dr. [Last Name]" in writing. If unsure of their preference, it's best to use the formal title "Dr." followed by their last name to show respect for their academic achievement.
Depends
It could be Dr (Doctor)
Or Professor
if the persons name is Simon Smith then the proper way to write it is:
Dr Simon Smith. the Dr replaces the Mr.
A person with a PhD is usually addressed as "Doctor" unless that person requests another form of address.
Married or not , this person may be rightly addressed as Dr.
A PhD is a doctor. You address a letter to him Dr. John Smith. If he is married you address it Dr. John and Jane Smith. If she has the PhD, you address it John and Dr Sue Smith. If both have their PhD's you address it Drs, Henry and Jane Smith.
A professor is higher in rank than a doctor; it would be more appropriate to address them as professor if they hold the title.
If John Smith has both a PhD and an MD, address him as "Doctor Smith". If he has a faculty appointment at a university, it might also be correct to address him as "Professor Smith." If he has a preference, he should let you know and you should use whichever form he prefers.
Same way you do anyone else. At BA/BS does not have a title. Only the PhD has the "Dr." given to the person who earns the degree.
Doctor.
The initials are also known as the return address so when the person writes back they can address you correctly
The return address on a letter identifies the address of the person writing the letter. It is typically placed at the top left corner of the envelope or letter.
no, since it may confuse the person you are writing to
If you are writing a business letter, you should begin with the date. After that comes the person's name, title, and address.
PhDPhilosophiae Doctor (Doctor of Philosophy). The PhD is a general degree type from which many specific programs of study fall. It is considered the highest level of educational attainment.