Informal letters don’t usually include standard phrases and formulations. Here we give some examples of an informal letter opening, body, and conclusion.
First of all, any informal letter opening should start with a greeting. If you do not know the name of the addressee, use “Dear Sir” or “Dear Madame.” If you know the name of the addressee and are in the working relationship: write “Dear Dr. Davidson” (Dr. = Doctor)! If this is your friend: “Dear Andrew” is a good template!