i need help with a letter

[Julliette]

hello.

i need to write a letter to a verry big departmant of a very sireous firm.
the porpous of the letter is a reques of thechnical informatio for personal reaserch.

how do i begin my letter?

[InnaI]

You begin with "Dear Sir/Madam" or if you know the name of a specific person you're writing to, Mr. XYZ or Ms. XYZ.

[Fourrier]

that's right