Special Contracts and Commercial Law
Discharge of Surety
Learn when a surety is discharged by variance, release, giving time, impaired remedies, lost securities or revocation of a continuing guarantee.
The short answer
A surety is discharged when an unauthorized change or creditor conduct materially alters the guaranteed risk or impairs the surety's eventual remedy.
Main grounds of discharge
State the precise section because similar creditor conduct can produce different results.
Variance, Section 133
A non-consensual variance in the principal contract discharges the surety as to transactions after the variance.
Release, Section 134
A contractual release or discharge of the principal debtor can discharge the surety, subject to the nature and source of the debtor's release.
Composition or time, Section 135
A binding arrangement with the debtor to compound, give time or not sue can discharge a non-consenting surety.
Impaired remedy, Section 139
The surety is discharged when the creditor's act or omission impairs the surety's eventual remedy.
Lost security, Section 141
Loss or parting with creditor securities without consent discharges the surety to the value of that security.
What does not automatically discharge
Delay alone is not the same as a binding promise to give time.
Agreement with a third person
An agreement to give time made with someone other than the principal debtor does not discharge the surety under Section 136.
Forbearance to sue
Mere failure to sue the principal debtor does not discharge the surety under Section 137.
Release of co-surety
Releasing one co-surety does not discharge the others, though contribution rights remain relevant.
Continuing guarantee
Revocation operates prospectively for future transactions under Sections 130 and 131.
Variance, release and discharge of the principal debtor
The first question is whether the creditor changed the guaranteed risk or legally released the person primarily liable.
Section 133 discharges a non-consenting surety for transactions after a variance in the terms of the contract between creditor and principal debtor. The answer should identify the original obligation, the later change, the surety's consent and the transactions occurring after that change. A merely administrative adjustment should not be labelled a variance without showing an alteration in the legal risk.
Section 134 deals with release or discharge of the principal debtor by contract with the creditor, and with creditor conduct whose legal consequence discharges the debtor. A discharge produced by operation of law is different. The source and effect of the debtor's release must therefore be stated before deciding the surety's position.
Composition, promise to give time and mere forbearance
Sections 135 to 137 draw a precise line between a binding arrangement and simple delay in enforcement.
Composition with the debtor
A binding agreement accepting a different settlement can discharge a surety who did not assent because it changes the creditor-debtor relationship and the surety's recourse.
Promise to give time or not sue
A binding promise made to the principal debtor can discharge a non-consenting surety under Section 135. The agreement and consideration supporting it should be proved.
Agreement with a third person
Section 136 preserves the surety's liability where the agreement to give time is made with someone other than the principal debtor.
Forbearance to sue
Mere inaction or delay does not discharge the surety under Section 137. It lacks the binding restriction on the creditor that Section 135 contemplates.
Impaired remedies and loss of security
The Act protects the surety's right to recover from the debtor and use the creditor's securities after payment.
Section 139 applies where the creditor acts inconsistently with the surety's rights or omits a duty owed to the surety and thereby impairs the eventual remedy against the principal debtor. The surety must connect the creditor's conduct with a real loss of recourse, not merely show that the creditor could have acted more quickly.
Section 141 entitles the surety to every security the creditor held when the guarantee was made, whether or not the surety knew of it. If the creditor loses or parts with security without consent, discharge is ordinarily measured by its value. Identify the security, possession, unauthorised release and valuation before quantifying the result.
Leading cases and what they establish
Read each authority for the proposition it proves, the legal question it answers and the reasoning that supports the result.
State Bank of Saurashtra v. Chitranjan Rangnath Raja
(1980) 4 SCC 516
Held: A creditor that loses or parts with security and impairs the surety's eventual remedy can discharge the surety to the relevant extent.
Why it matters: Use it for Sections 139 and 141 where secured goods or collateral are lost.
Bank of Bihar Ltd. v. Damodar Prasad
AIR 1969 SC 297
Held: Mere failure to first pursue the principal debtor does not discharge the surety, whose liability is ordinarily immediate.
Why it matters: Use it to reject an argument based only on the creditor not suing the debtor first.
Using this topic in a legal answer
A clear answer sequence
- Identify the creditor act said to discharge the surety.
- Select the exact section from 130 to 141.
- Check consent, timing and effect on the guaranteed risk.
- State whether discharge is complete, prospective or limited by value.
Points that are often confused
- Treating mere delay in suing as discharge.
- Ignoring the surety's consent to a variation.
- Failing to value lost securities.
Open the revision and self-check sheet
Rules to retain
- Unauthorized variance affects later transactions.
- Binding time given to the debtor differs from forbearance.
- Impaired remedies can discharge the surety.
- Continuing guarantees are revoked prospectively.
Questions to test understanding
- Does mere forbearance to sue discharge the surety?
- How does Section 141 measure discharge?
- What is the effect of revoking a continuing guarantee?
Questions students ask
Does delay in suing the borrower discharge the guarantor?
Mere forbearance to sue does not ordinarily discharge the surety under Section 137.
What happens when the creditor loses security?
The surety is generally discharged to the extent of the value of security lost or parted with without consent.
Does every change in the loan arrangement discharge the surety?
No. Section 133 requires a variance in the terms of the guaranteed contract without the surety's consent. The change and the post-variance transactions must be identified precisely.
Is discharge under Section 141 always complete?
No. Loss or unauthorised release of security ordinarily discharges the surety to the value of that security, so evidence of value is essential.
Primary sources and further reading
- Indian Contract Act, 1872 on India Code
- Supreme Court discussion of surety rights in securities
- Indian Contract Act, 1872, official PDF
This article is written for legal education. Verify the governing provision, applicable amendments and complete judgment before relying on a proposition in practice.