If it is possible, do some research and find on their website how they refer to themselves.
If you know the person’s name but you are not sure of their gender, you can use their full name instead of a courtesy title, such as “Dear Jamie Wilde. ”
If your letter is addressed to the team of people, you may use the team or department name, for example “Dear Hiring Team:”
The differences in these are largely a matter of preference; however, block style is more commonly used in business letters today.
If you are writing your letter in block format, your address should be lined up with the left margin. If you are using indented format, start one tab right of the center margin. Phone numbers and email addresses are generally not included in the sender’s address, but they are acceptable.
Examples of salutations might include “Dear Mrs. Wells:” or “Dear Professor:”
The complimentary close should be a phrase such as “Best regards” or “Thank you” and should be followed by a comma. Only the first word is capitalized. Skip 4 lines, which is the space for your signature, then end with your name. [15] X Research source