Banking and Insurance - Laws and Practice · Advances, Securities and Documentation

Contract of Guarantee and Surety's Rights for Bankers

Updated 11 October 2026 · Fact-checked

A contract of guarantee is a contract to perform the promise, or discharge the liability, of a third person in case of his default (section 126). To solve a question, identify the three parties, test each act of the bank against the discharge sections (133, 134, 135, 139, 141), and conclude whether the surety is fully or partly discharged.

Understand Contract of Guarantee and Surety's Rights

Banks lend against a borrower's promise, but they often want a second person to stand behind the loan. That second person is the surety. The law calls the arrangement a contract of guarantee. Section 126 defines it as a contract to perform the promise, or discharge the liability, of a third person in case of his default. A guarantee may be oral or written. Banks always take it in writing.

There are three parties. The principal debtor is the borrower, in respect of whose default the guarantee is given. The creditor is the bank, to whom the guarantee is given. The surety is the person who gives the guarantee. The surety's liability is secondary: it arises only when the principal debtor defaults.

The law protects the surety because the surety carries risk without enjoying the loan. So the Act lists situations in which the surety is discharged, meaning freed from liability, wholly or partly. Most exam questions are about whether the bank's conduct has discharged the surety.

Section 141 is about securities. A surety is entitled to the benefit of every security the creditor has against the principal debtor at the time the contract of suretyship is entered into, whether the surety knows of it or not. If the creditor loses it, or parts with it without the surety's consent, the surety is discharged to the extent of the value of the security. So a bank that releases a mortgage or hands back pledged goods carelessly may recover less from the guarantor.

Once the surety pays or performs all that he is liable for, he steps into the creditor's shoes (section 140). He gets all the rights the creditor had against the principal debtor. This is the surety's right against the debtor. His right against the creditor is the benefit of securities under section 141.

Key rules to remember

Contract of guarantee (s.126): Guarantee = contract to perform the promise or discharge the liability of a third person in case of his default; Three parties: surety, principal debtor, creditor. May be oral or written.
Surety's right to securities (s.141): Discharge = value of the security lost or parted with without the surety's consent; Applies to securities held at the time the suretyship contract is entered into, even if the surety does not know of them. Discharge is only to the extent of the value.
Surety's rights on payment (s.140): On payment or performance of all he is liable for, surety gets all the creditor's rights against the principal debtor; Available when the guaranteed debt has become due or default has taken place.
Variance (s.133): Variance in terms without surety's consent → surety discharged as to transactions after the variance; Applies to the contract between the principal debtor and the creditor.
Release of debtor (s.134): Contract releasing the principal debtor, or act or omission of creditor that legally discharges him → surety discharged; Illustration: B's composition with creditors releasing him discharges A.
Composition, time, promise not to sue (s.135): Contract between creditor and principal debtor to compound, give time or not to sue → surety discharged unless he assents; The contract must be with the principal debtor.
Third person gives time (s.136): Contract to give time made with a third person, not the principal debtor → surety not discharged; Contrast with s.135.
Mere forbearance (s.137): Mere forbearance to sue or enforce remedies does not discharge surety, absent a contrary provision in the guarantee; Silence or delay is not the same as a contract giving time.
Impairing surety's remedy (s.139): Act inconsistent with surety's rights, or omission of a duty owed to surety, impairing his eventual remedy against the debtor → surety discharged; Illustration: prepaying instalments without the surety's knowledge.

How to solve Contract of Guarantee and Surety's Rights questions

Use the same sequence for any guarantee problem. It keeps your answer in the provision, analysis, conclusion format.

1Identify the creditor, principal debtor and surety, and confirm there is a guarantee under section 126.
2List every act or omission of the bank after the guarantee: variation, time given, release, loss of security, prepayment, or mere delay.
3Match each act to its section: 133 for variance, 134 for release, 135 for composition or time, 136 for time given to a third person, 137 for mere forbearance, 139 for impairing the surety's remedy, 141 for securities.
4Check the key condition: did the surety consent or assent, and was the contract made with the principal debtor?
5For section 141, confirm the security existed when the guarantee was given, then fix the extent: the value of the security lost or released.
6State the conclusion: fully discharged, discharged to the extent of the value, discharged only for later transactions, or not discharged.
7Add the practical point: the bank should get the surety's written consent or include a clause preserving liability.

Quickest way: Act, section, consent, extent

When to use it: Use it for short case-based questions when you have only a few minutes.

Underline the bank's act in the facts.
Name the section it triggers.
Ask if the surety consented, and whether the other party was the principal debtor.
Write the extent: full, partial (value of security), or none.
Close with one drafting point for the bank.

Common mistakes in Contract of Guarantee and Surety's Rights

Saying the surety is discharged completely whenever the bank releases a security.
Students remember 'discharged' and forget the limit in section 141.
Fix: Write that the surety is discharged to the extent of the value of the security lost or parted with.
Treating mere delay in suing as discharge of the surety.
Delay seems to prejudice the surety, so it feels like it should discharge.
Fix: Cite section 137: mere forbearance to sue does not discharge the surety unless the guarantee says otherwise.
Applying section 135 when the bank gave time to a third person.
Students notice 'time given' and stop reading.
Fix: Check who the contract is with. Under section 136, time given by contract with a third person does not discharge the surety.
Applying section 141 to a security taken after the guarantee was signed.
Students read 'every security' and ignore the timing condition.
Fix: Section 141 covers securities held when the suretyship contract is entered into. See illustration (c): a later security that is given up does not discharge the surety.
Forgetting the consent test.
Students focus on the bank's act, not on whether the surety agreed.
Fix: Variance (s.133), parting with security (s.141) and giving time (s.135) turn on the surety's consent or assent. Always state it.

Worked examples

Example 1

Rohan Traders borrows ₹10,00,000 from Sunrise Bank. Meera guarantees the loan. At that time the bank also holds a mortgage over Rohan's shop worth ₹6,00,000. Later the bank releases the mortgage without telling Meera. Rohan defaults. Advise Meera's liability.

Show the solution

Provision: section 141 gives the surety the benefit of every security the creditor holds against the principal debtor when the guarantee is entered into, whether the surety knows of it or not.
Analysis: the mortgage existed when the guarantee was given. The bank released it without Meera's consent, so the section applies even though Meera did not know about it.
Extent: Meera is discharged to the extent of the value of the security, which is ₹6,00,000.
Calculation: ₹10,00,000 − ₹6,00,000 = ₹4,00,000.

Answer: Meera is discharged to the extent of ₹6,00,000. The bank can claim at most ₹4,00,000 from her, assuming the full debt of ₹10,00,000 is unpaid.

Example 2

Anil guarantees a term loan by Sunil to Metro Bank. Without informing Anil, the bank and Sunil agree that Sunil will repay the loan one year later than the original schedule. Sunil then defaults. Can the bank recover from Anil? Would your answer change if the bank had merely not sued Sunil for a year after the due date?

Show the solution

Provision: section 135 says a contract between the creditor and the principal debtor to give time discharges the surety unless the surety assents.
Analysis: here the bank and Sunil made an agreement to extend time. Anil did not assent. So Anil is discharged.
Alternative facts: if the bank only delayed suing, there is no contract giving time. Section 137 says mere forbearance does not discharge the surety, unless the guarantee provides otherwise.
Practical point: banks usually add a clause in the guarantee deed that the surety consents in advance to extension of time.

Answer: On the first facts, the bank cannot recover from Anil because he is discharged under section 135. If the bank merely forbore to sue, Anil remains liable under section 137.

Exam tips

Write the section number next to each rule. Examiners reward the provision, analysis and conclusion structure.
In every problem, state whether the surety consented. It is usually the deciding fact.
Practise short contrasts: section 135 versus 136, and section 135 versus 137. They are favourite traps.
When a security is lost, always compute the discharge as the value of that security, not the whole debt.
End with a practical drafting point, such as a clause preserving the surety's liability despite variation or extension, to show banking awareness.

Practice questions from Advances, Securities and Documentation

Contract of Guarantee and Surety's Rights in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

CMA IntermediateContract of Guarantee: Surety, Principal Debtor, Creditor

Contract of Guarantee and Surety's Rights: frequently asked questions

What does section 141 say about a surety's rights?

A surety is entitled to the benefit of every security the creditor holds against the principal debtor when the suretyship contract is made, whether or not the surety knows of it. If the creditor loses it or parts with it without the surety's consent, the surety is discharged to the extent of its value.

Is a guarantee valid if it is oral?

Yes. Section 126 says a guarantee may be oral or written. Banks use written guarantees for proof and to include protective clauses.

Does delay by the bank in suing discharge the surety?

No. Under section 137, mere forbearance to sue the principal debtor or enforce any other remedy does not discharge the surety, unless the guarantee provides otherwise. A binding contract to give time to the debtor is different and falls under section 135.

What rights does a surety get after paying the bank?

Under section 140, when the guaranteed debt has become due or the principal debtor has defaulted, the surety who pays or performs all he is liable for gets all the rights the creditor had against the principal debtor.