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Memo vs. Letter: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Published on February 14, 2024
A memo is a concise, internal communication document within an organization, while a letter is a more formal, detailed, and versatile document that can be used both internally and externally.
Memo vs. Letter

Key Differences

A memo (memorandum) is primarily used for internal communication within an organization, focusing on brief and direct information sharing. In contrast, a letter is a more formal document used for both internal and external communication, often conveying more detailed and personalized information.
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Shumaila Saeed
Feb 14, 2024
Memos typically follow a simple and standardized format, emphasizing brevity and clarity. Letters, on the other hand, have a more flexible format, allowing for various degrees of formality and personalization, depending on the recipient and purpose.
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The content of a memo is usually straightforward and to the point, often addressing specific issues or instructions. Letters can cover a broader range of subjects and can vary in tone from formal and professional to personal and intimate, depending on the context and audience.
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Memos are usually distributed within an organization and are intended for internal stakeholders, such as employees or department heads. Letters can be directed to individuals or organizations outside the company, such as clients, customers, or other businesses, and often require more careful consideration of language and protocol.
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Shumaila Saeed
Feb 14, 2024
The use of memos has been a staple in business communication for decades, reflecting the need for efficient internal communication. Letters have a much longer history and have evolved from personal handwritten notes to more formal typed formats, used in a wide range of contexts from personal correspondence to official business communications.
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Comparison Chart

Primary Use

Internal communication
Internal and external communication
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Format

Standardized, brief
Flexible, can be formal or informal
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Content

Direct, issue-specific
Diverse, detailed
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Tone

Typically straightforward and factual
Ranges from formal to personal
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Distribution

Within an organization
To individuals or entities outside
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Memo and Letter Definitions

Memo

Informative Note
She received a memo about the upcoming audit.
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Letter

Written Correspondence
He wrote a letter expressing his concerns.
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Memo

Internal Document
The manager sent a memo regarding the new policy.
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Letter

Formal Communication
The company sent a letter to its stakeholders.
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Memo

Brief Communication
A memo was circulated about the meeting change.
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Letter

A written symbol or character representing a speech sound and being a component of an alphabet.
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Memo

Reminder
A memo was sent as a reminder for the deadline.
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Letter

A written symbol or character used in the graphemic representation of a word, such as the h in Thames. See Note at Thames.
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Memo

A memorandum.
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Letter

A written or printed communication directed to a person or organization.
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Memo

A short note; a memorandum.
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Letter

Often letters A certified document granting rights to its bearer.
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Memo

(programming) A record of partial results that can be reused later without recomputation.
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Letter

Literal meaning
Had to adhere to the letter of the law.
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Memo

(informal) To record something; to make a note of something.
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Letter

Literary culture; belles-lettres.
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Memo

(informal) To send someone a note about something, for the record.
I made sure to memo him about the client's complaints.
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Letter

Learning or knowledge, especially of literature.
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Memo

A written proposal or reminder
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Letter

Literature or writing as a profession.
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Memo

Directive Notice
The memo instructed all departments to cut costs.
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Letter

A piece of type that prints a single character.
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Letter

A specific style of type.
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Letter

The characters in one style of type.
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Letter

An emblem in the shape of the initial of a school awarded for outstanding performance, especially in varsity athletics.
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Letter

To write letters on
Lettered the paper.
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Letter

To write in letters
Lettered our name on the mailbox.
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Letter

To write or form letters.
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Letter

To earn a school letter, as for outstanding athletic achievement
She lettered in three collegiate sports.
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Letter

A symbol in an alphabet.
There are twenty-six letters in the English alphabet.
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Letter

A written or printed communication, generally longer and more formal than a note.
I wrote a letter to my sister about my life.
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Letter

The literal meaning of something, as distinguished from its intended and remoter meaning (the spirit).
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Letter

Literature.
Benjamin Franklin was multiskilled – a scientist, politician and a man of letters.
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Letter

(law) A division unit of a piece of law marked by a letter of the alphabet.
Letter (b) constitutes an exception to this provision.
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Letter

A size of paper, 8½ in × 11 in (215.9 mm × 279.4 mm, US paper sizes rounded to the nearest 5 mm).
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Letter

A size of paper, 215 mm × 280 mm.
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Letter

Clipping of varsity letter
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Letter

A single type; type, collectively; a style of type.
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Letter

One who lets, or lets out.
The letter of a room
A blood-letter
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Letter

(archaic) One who retards or hinders.
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Letter

(transitive) To print, inscribe, or paint letters on something.
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Letter

To earn a varsity letter (award).
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Letter

One who lets or permits; one who lets anything for hire.
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Letter

One who retards or hinders.
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Letter

A mark or character used as the representative of a sound, or of an articulation of the human organs of speech; a first element of written language.
And a superscription also was written over him in letters of Greek, and Latin, and Hebrew.
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Letter

A written or printed communication; a message expressed in intelligible characters on something adapted to conveyance, as paper, parchment, etc.; an epistle.
The style of letters ought to be free, easy, and natural.
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Letter

A writing; an inscription.
None could expound what this letter meant.
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Letter

Verbal expression; literal statement or meaning; exact signification or requirement.
We must observe the letter of the law, without doing violence to the reason of the law and the intention of the lawgiver.
I broke the letter of it to keep the sense.
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Letter

A single type; type, collectively; a style of type.
Under these buildings . . . was the king's printing house, and that famous letter so much esteemed.
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Letter

Learning; erudition; as, a man of letters.
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Letter

A letter; an epistle.
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Letter

A telegram longer than an ordinary message sent at rates lower than the standard message rate in consideration of its being sent and delivered subject to priority in service of regular messages. Such telegrams are called by the Western Union Company day letters, or night letters according to the time of sending, and by The Postal Telegraph Company day lettergrams, or night lettergrams.
A strange lock that opens with AMEN.
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Letter

To impress with letters; to mark with letters or words; as, a book gilt and lettered.
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Letter

A written message addressed to a person or organization;
Mailed an indignant letter to the editor
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Letter

The conventional characters of the alphabet used to represent speech;
His grandmother taught him his letters
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Letter

A strictly literal interpretation (as distinct from the intention);
He followed instructions to the letter
He obeyed the letter of the law
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Letter

An award earned by participation in a school sport;
He won letters in three sports
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Letter

Owner who lets another person use something (housing usually) for hire
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Letter

Win an athletic letter
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Letter

Set down or print with letters
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Letter

Mark letters on or mark with letters
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Letter

Personal Message
She received a heartfelt letter from a friend.
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Letter

Document of Record
The lawyer drafted a letter of agreement.
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Letter

Mail Item
A letter arrived in the post today.
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Repeatedly Asked Queries

How long is a typical memo?

Memos are usually brief and concise.
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Can letters be informal?

Yes, letters can range from very formal to personal and informal.
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Can a letter be legally binding?

Certain types of letters, like contracts, can be legally binding.
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Are memos legally binding?

Memos are not typically legally binding but can serve as records of internal communications.
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What is the tone of a typical memo?

The tone of a memo is usually straightforward and factual.
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What is a memo mainly used for?

A memo is used for quick, internal communication in an organization.
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How is a letter delivered?

Letters can be delivered via postal services, email, or hand-delivered.
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What is the purpose of a letter?

A letter serves as a formal means of communication, both internally and externally.
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What format does a memo follow?

Memos follow a standardized format, often with headers indicating subject, date, and recipients.
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Is a memo used for external communication?

No, memos are primarily for internal use within an organization.
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Do memos include greetings and closings?

Memos usually skip formal greetings and closings, focusing on the message content.
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Should letters include greetings and closings?

Yes, letters typically include a greeting at the beginning and a closing at the end.
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How are letters archived?

Letters are often archived as part of official records or personal correspondence.
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Do letters require a specific format?

Letters have more flexible formats, but formal letters often follow a conventional structure.
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Are letters used for official announcements?

Letters can be used for official announcements, especially when formal communication is required.
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Is a memo a permanent record?

A memo can serve as a permanent record of internal communication.
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Can a letter be sent to someone outside an organization?

Yes, letters are commonly sent to individuals or entities outside an organization.
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How is a memo distributed?

Memos are usually distributed via email or internal mail systems within a company.
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What tone can a letter have?

A letter's tone can vary widely, from formal and professional to personal and friendly.
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Can memos be used for announcements?

Yes, memos are often used for internal announcements.
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Shumaila Saeed
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Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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