Letter writing

Personal or Confidential Notation. An indication that the letter is to be opened only by the addressee. Place the notation beneath the dateline or flush left, two to four lines above the inside address. (On the envelope, position the notation, in all capital letters, to the left of and two lines above the address block.)
Postscript. Used for comments unrelated to the message of the letter but not for remarks you neglected to include in the body. Place it beneath the last notation and place the sender’s initials immediately after the last word in the postscript.
Reference Line. A designation of file or order numbers (Your ref. 658942; Our file 57XY-689). A line such as Please refer to or In reply please refer to may be printed just beneath the letterhead address; otherwise, insert the reference two lines beneath the dateline.
Salutation. A greeting to the recipient. It is typed two lines below the inside address flush left.

Signature. The name and title of the person writing the letter. Place it four lines below the complimentary close: