Informal or Personal Letter: The letter which does not follow any formal rule
and contains personal information is known as informal or personal letter. This type
of letter is written to relatives and friends for exchanging news or feelings or to seek
favors. The basis of writing personal letter is personal relationship.
Business Letter: The letter which contains commercial information and is written
among business people is called business letter or commercial letter. Business
letters are formal, structured and non-personal. Commercial letter contains
information relating to trade inquiry, circular, order, complaint, claims, adjustment,
collection relating to trade inquiry, circular, order, complaint, claims, adjustment,
collection etc.
Official Letter: When letter is written containing the official information like rules,
regulations, facts and figures, activities, system, procedure etc. it is called official
letter. In other word, when
a letter is written following the official decorum, it is known as official letter. Officials
use this type of letter to send official message to other branches and offices. Official
letter strictly follows the prescribed rules, regulations, structure and style of the
office.
Social Letter: Letter that is written on any social occasion or purpose is called
social letter. Invitation letters for different programs, thanks letter, condolence letter,
congratulation letter etc. fall in the category of social letter. It is actually one kind of
personal letter.
Report Letter: Letter that is prepared in the form of report or investigation and is
sent to the person, who has assigned it, is called report letter. In real sense, it is a
short report in the form of letter. The letter sent to the sales manager by the sales
man on every day’s sales volume in an example of report letter.
Notice Letter: Notice letter is a letter that is sent to a person notifying or informing
him about any special topic.
Circular Letter: A letter that circulates or announces the same information or
message to a large number of people at a time is called a circular letter or a circular.
Announce of new product, change of business address, retirement or admission of
partner etc. requires circulating the certain message. For this purpose circular letter
is written.
Order Letter: When the quotation of the seller satisfies the queries of the
prospective buyer, he places order through an order letter. So, after granting the
quotation, the letter which the buyer writes to the supplier or seller, requesting him
to deliver the prescribed amount of goods is called an order letter.
Complaint Letter: However efficient an organization may be in running a
business, everything does not go all the time according to plan. There will be some
mistakes and some accidents. Letters written to bring these mistakes to the notice
of those who must own the responsibility for them are called claim or complaint
letters.