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Business StudiesISC Class 12 · Business Correspondence

Parts of a Business Letter and Trade Letters (ISC Class 12)

Updated 18 October 2026 · Fact-checked

A business letter has ten parts in order: letterhead, reference and date, inside address, salutation, subject, reference line, body, complimentary close, signature block (name and designation) and enclosures. Trade letters are the enquiry, quotation, order, complaint and reply to a complaint. Marks are lost mainly for format errors and missing details such as quantity, price, packing, delivery and payment terms.

Learn the ten parts in this top-to-bottom order; the body is the largest block, and the close must match the salutation.

Illustration drawn for QuestionBuddy.

Understand Parts of a Business Letter and Trade Letters

1. Need and functions. Business letters convey information such as enquiries, orders and complaints; they are a permanent record and legal evidence; they build goodwill; they reach parties at a distance cheaply; and they are a reference for future dealings.

2. Parts of a business letter (in order)

1. Heading or letterhead (name, address, phone, e-mail of the sender).
2. Reference number and date.
3. Inside address (a specific person or post, for example the Sales Manager).
4. Salutation: Dear Sir/Madam (impersonal, takes 'Yours faithfully') or Dear Mr/Ms [Name] (named, takes 'Yours sincerely').
5. Subject line: the topic in brief.
6. Reference line: earlier letter, quotation or advertisement (number or newspaper, and date).
7. Body: opening, main message, closing.
8. Complimentary close, immediately after the body: Yours faithfully after 'Dear Sir/Madam'; Yours sincerely after a named salutation such as 'Dear Mr Rao'.
9. Signature block: signature, name and designation (For the firm).
10. Enclosures and copies, if any.

3. The trade letters

  • Enquiry (buyer to seller): asks for catalogue, price list, quality, discount, delivery and payment terms; says where the buyer learnt of the seller.
  • Quotation (seller's reply): states price, trade discount, terms of delivery and payment, validity, and encloses a catalogue.
  • Order (buyer to seller): states quantity, description or quality, rate, total, packing, mode and date of delivery, payment terms; refers to the quotation; asks for acknowledgement; signed by the Purchase Manager.
  • Complaint (buyer to seller): about defective, damaged, wrong or delayed goods; gives the order reference, describes the fault politely, names the remedy wanted (replacement, repair, discount) and a reasonable time.
  • Reply to a complaint (seller): acknowledges, apologises if at fault, gives the cause, states the remedy and assures that it will not recur.

4. A specimen order body (fictional numbers)

Items: 30 registers at Rs 80 = Rs 2,400; 12 box files at Rs 150 = Rs 1,800; total Rs 4,200. Less 5% trade discount of Rs 210 gives Rs 3,990 payable. Check: 4,200 x 5/100 = 210; 4,200 - 210 = 3,990.

5. Format discipline. Use one alignment throughout (full block), do not swap sender and receiver, use the correct salutation and close (Dear Sir/Madam with Yours faithfully; Dear Mr/Ms [Name] with Yours sincerely), and sign with name and designation. Missing details are penalised as heavily as format errors.

Parts of a Business Letter and Trade Letters: key facts

Parts of a letter
  • Letterhead
  • Reference and date
  • Inside address
  • Salutation
  • Subject
  • Reference line
  • Body
  • Close
  • Signature
  • Enclosures
Learn the order.
Order letter checklist
  • Quantity
  • Quality
  • Price
  • Total
  • Packing
  • Delivery
  • Payment
  • Reference
  • Acknowledgement
Every item counts.
Reply to a complaint
  • Acknowledge
  • Apologise
  • Cause
  • Remedy
  • Assure
Goodwill is the aim.

How to answer Parts of a Business Letter and Trade Letters questions

A drafting question gives details and asks for a letter. A short question asks for a part or the contents of a letter.

  1. 1Identify who writes to whom, and which letter it is, so sender and receiver are not interchanged.
  2. 2Write the parts in order, using only the details supplied, with a fictional reference number if needed.
  3. 3Include every essential detail for that letter (for an order: quantity, price, packing, delivery, payment).
  4. 4Calculate totals and discounts correctly, close with Yours faithfully (after Dear Sir/Madam) and sign with name and designation.

Parts of a Business Letter and Trade Letters in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Order letter details

Suppose a school canteen orders 40 packets of flour by letter but does not state the weight of a packet or the delivery date.

What can go wrong, and what should the letter contain?

Try it first, then show the solutionSolution
  1. The supplier might send packets of a different weight or deliver late.
  2. The letter should state quantity, size, rate, packing, delivery date and payment terms.

Answer: Wrong or late goods; the missing specifications were needed.

Memory hook: An order letter is a small contract.

Reply to a complaint

Imagine a customer writes that a table lamp reached her with a broken shade.

What should the seller's reply contain?

Try it first, then show the solutionSolution
  1. Acknowledge the complaint and apologise.
  2. Offer a replacement and promise stronger packing.

Answer: Acknowledge, apologise, remedy, assure.

Memory hook: Sorry, fix, never again.

Tricks to remember Parts of a Business Letter and Trade Letters

Short memory aids. Say each one aloud once, then use it on a question the same day.

  • LR-I-S-S-R-B-C-S-E

    Letterhead, Ref and date, Inside address, Salutation, Subject, Reference line, Body, Close, Signature, Enclosures.

    Use it when: Recalling the order of the ten parts.

  • Enquiry asks, quotation tells, order buys

    Buyer asks (enquiry), seller tells (quotation), buyer buys (order).

    Use it when: Seeing who writes each letter.

Parts of a Business Letter and Trade Letters: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Who writes the quotation · 1 mark · MCQBoard level

A letter sent by a seller giving prices and terms in reply to an enquiry is called a:
(a) order letter
(b) quotation letter
(c) complaint letter
(d) circular

Try it first, then show the solutionSolution
  1. A seller's reply to an enquiry with prices and terms is a quotation.

Answer: (b)

Example 2: Subject and reference lines · 2 marks · Short answerBoard level

State the purpose of the reference line and of the signature block in a business letter.

Try it first, then show the solutionSolution
  1. Reference line: links the letter to an earlier letter, quotation or advertisement by number and date.
  2. Signature block: gives the signature, name and designation of the person who is responsible for the letter.

Answer: Reference line links to earlier dealings; signature block shows the responsible officer.

Example 3: Order calculation · 4 marks · Short answerHarder board level

Suppose a stationer orders 30 registers at Rs 80 each and 12 box files at Rs 150 each, with 5% trade discount. Calculate the amount payable and name the officer who should sign the order.

Try it first, then show the solutionSolution
  1. Registers: 30 x 80 = Rs 2,400.
  2. Box files: 12 x 150 = Rs 1,800.
  3. Total = 2,400 + 1,800 = Rs 4,200.
  4. Trade discount = 4,200 x 5/100 = Rs 210; payable = 4,200 - 210 = Rs 3,990.
  5. The order is signed by the Purchase Manager.

Answer: Rs 3,990 payable; signed by the Purchase Manager.

Example 4: Spot the faults · 4 marks · Short answerHarder board level

A draft order letter says: 'Please send some pens soon. We shall pay later. Yours faithfully, Sales Manager.' The sender is the buyer. List four faults and correct them.

Try it first, then show the solutionSolution
  1. Quantity and quality are missing: state the number and type of pens.
  2. Price and total are missing: refer to the quotation and give the rate and total.
  3. Delivery and payment terms are vague: state the date, mode of delivery, and the payment terms, for example 30 days.
  4. The signatory should be the Purchase Manager, as the buyer's officer, not the Sales Manager, and no acknowledgement or reference is requested.

Answer: Missing quantity, price, delivery and payment details, wrong signatory, no reference or acknowledgement.

Example 5: Draft an enquiry · 8 marks · Long answerHOTS / competency

Suppose you are Neha Rao, Administrative Manager of Greenleaf Opticals, 7 Station Road, Nagpur 440001. You saw an advertisement of Clearview Lenses, 12 Market Street, Indore 452001, in The Daily Sentinel of 5 March. Draft a letter of enquiry for 200 pairs of lenses.

Try it first, then show the solutionSolution
  1. Letterhead of Greenleaf Opticals, reference number and date (fictional), and the inside address: The Sales Manager, Clearview Lenses, 12 Market Street, Indore 452001.
  2. Salutation: Dear Sir/Madam. Subject: Enquiry about lenses. Reference: your advertisement in The Daily Sentinel dated 5 March.
  3. Body: say you are interested in about 200 pairs and ask for catalogue, price list, types and quality, trade discount, delivery period and terms of payment; request an early reply.
  4. Close: Yours faithfully, signature, Neha Rao, Administrative Manager.

Answer: Correct letterhead, reference line, specific requests, close and signature in the right order.

Where students lose marks in Parts of a Business Letter and Trade Letters

The slips examiners see most often, and what to write instead.

  • Mistake: Sender and receiver interchanged

    CISCE examiners' comments mention format errors such as interchanged sender and receiver, as noted on the chapter page.

    Wrong working

    Letterhead of the seller on an order letter written by the buyer.

    Right working

    Letterhead of the buyer; inside address of the seller.

    Do this: Underline who is writing before you begin.

    Usually costs: 2-3 marks.

  • Mistake: Missing essential details in an order

    Students omit packing, delivery or payment terms.

    Wrong working

    Please supply 100 files soon.

    Right working

    Please supply 100 files of the quoted quality at the quoted rate, packed in cartons, by 20 July by road, payment within 30 days.

    Do this: Run through the checklist.

    Usually costs: 1-2 marks.

  • Mistake: Wrong signatory or no designation

    An order is signed by the buyer's Purchase Manager.

    Wrong working

    Signed by the Sales Manager of the buying firm.

    Right working

    Signed by the Purchase Manager, with name and designation.

    Do this: Match the signatory to the department.

    Usually costs: 1 mark.

Exam tips

  • Keep one consistent alignment (full block) throughout.
  • Use only details given in the question; invent nothing that changes the facts.
  • Do not forget the subject and reference lines, which many drafts leave out.
  • Check arithmetic in an order letter twice.

Practice questions on Parts of a Business Letter and Trade Letters

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

  1. Q1 · 1 mark · Very short answerBoard level

    Name the part of a letter that states in brief what the letter is about.

    Hint

    Topic line.

    Answer

    The subject line.

  2. Q2 · 2 marks · Short answerBoard level

    State any two functions of business correspondence.

    Hint

    Record and goodwill.

    Answer

    It conveys information; serves as a permanent record and legal evidence; builds goodwill; reaches distant parties cheaply (any two).

  3. Q3 · 2 marks · Short answerHarder board level

    A buyer orders 50 chairs at Rs 700 each and 5 tables at Rs 3,200 each, less 10% trade discount. Calculate the net amount payable.

    Hint

    Add, then discount.

    Answer

    Chairs: 50 x 700 = Rs 35,000. Tables: 5 x 3,200 = Rs 16,000. Total Rs 51,000. Discount 10% = Rs 5,100. Payable = Rs 45,900.

  4. Q4 · 4 marks · Short answerHarder board level

    Suppose a customer received 24 plates of which 6 were cracked. Explain what the complaint letter must contain and what the reply from the seller must contain.

    Hint

    Facts, remedy, goodwill.

    Answer

    Complaint: order reference and date, the fault (6 of 24 plates cracked), the remedy wanted (replacement or credit), a reasonable time, polite tone. Reply: acknowledge, apologise if at fault, explain the cause, offer replacement or credit note, assure better packing.

  5. Q5 · 4 marks · Short answerHOTS / competency

    A seller's quotation says the rate is valid for 15 days from 1 June. The buyer orders on 20 June at the quoted rate. Advise the buyer about the risk and what the order letter should say.

    Hint

    Validity period.

    Answer

    The quotation expired on 16 June, so the seller need not honour the rate. The buyer should first confirm that the rate still holds; the order letter should refer to the quotation and that confirmation, and state quantity, price, delivery and payment terms.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

  1. 1.Who writes a letter of enquiry?Show answer

    The prospective buyer.

  2. 2.Who signs an order letter?Show answer

    The buyer's Purchase Manager.

  3. 3.What does a quotation contain?Show answer

    Prices, trade discount, delivery and payment terms, validity.

  4. 4.What is the standard salutation and close?Show answer

    Dear Sir/Madam is closed with Yours faithfully; a named salutation such as Dear Mr/Ms [Name] is closed with Yours sincerely.

Parts of a Business Letter and Trade Letters: frequently asked questions

Do I need a letterhead in the exam?

Yes. Give the sender's name and address at the top in the format you are using.

Can I invent a reference number?

Yes, a simple fictional one is accepted, but do not invent facts that change the question.

Is a reply to a complaint just an apology?

No. It also states the cause and the remedy and assures the customer.