Difference between a memo and a letter

Difference between a memo and a letter are:


  • A memo is used internally within an organization moving upward, downward or horizontally. It is never sent outside.
  • A memo does not require return address, salutation or complimentary close. It uses: To, from, Date and Subject heading
  • A memo can use technical jargon and abbreviations because their meaning is understood by the people within the organization.
  • It is costly.
  • The language of the memo is simple and less formal.


  •  Whereas letters are used both for internal and external communication It has also large usage beyond the scope of an organization.
  •  A letter requires inside address, salutation and complimentary close.
  • While communicating with external people through letter Simple words are encouraged rather than jargon.
  • It is less costly than a memo.
  • The language of the letter is planned and formal.