Grounds for Discharge of Liability of an Unpaid Seller

 Under the Indian Contract Act, 1872, a surety’s liability is not permanent. Since the contract of guarantee is a "tripartite" agreement, any significant change in the relationship between the creditor and the debtor, or any act that weakens the surety's position, can lead to a discharge.

The modes of discharge are broadly categorized into three types: Revocation, Conduct of the Creditor, and Invalidation.

1. Discharge by Revocation

• Notice of Revocation (Section 130): In a continuing guarantee (one that covers a series of transactions), the surety can at any time revoke the guarantee for future transactions by giving notice to the creditor. The surety remains liable for transactions already completed.

• Death of Surety (Section 131): In a continuing guarantee, the death of the surety acts as a revocation regarding future transactions, unless the contract states otherwise.

2. Discharge by Conduct of the Creditor

This is the most common ground for discharge. The law protects the surety from any "surprises" or changes made without their consent.

• Variance in Terms (Section 133): If the creditor and principal debtor change the terms of their contract (e.g., increasing the interest rate) without the surety's consent, the surety is discharged for all transactions following that change.

  • Case Law: Khatun Bibi v. Barkat Ali. The court held that even a "beneficial" change for the surety discharges them if it was done without consent.

• Release or Discharge of Principal Debtor (Section 134): If the creditor enters into a contract that releases the debtor, or does an act that legally results in the debtor’s discharge, the surety is also released.

• Compounding or Granting Time (Section 135): If the creditor makes a contract with the debtor to "compound" (settle for less) or promises to give the debtor extra time to pay, the surety is discharged unless they agreed to it.

• Loss of Security (Section 141): A surety is entitled to the benefit of every security the creditor has against the debtor at the time of the guarantee. If the creditor loses or parts with such security without the surety's consent, the surety is discharged to the extent of the value of that security.

3. Discharge by Invalidation

A guarantee may be void from the beginning or become invalid, releasing the surety:

• Guarantee Obtained by Misrepresentation (Section 142): If the creditor obtained the guarantee by misrepresenting a material fact.

• Guarantee Obtained by Concealment (Section 143): If the creditor remained silent about a material circumstance that they should have disclosed.

• Failure of Co-surety to Join (Section 144): If a person gives a guarantee on the condition that another person must also join as a co-surety, the guarantee is not valid if that other person does not join.

Grounds for Discharge of Liabilities of an Unpaid Seller

Category	Specific Ground	Legal Effect
Revocation	Notice / Death	Stops liability for future debts.
Creditor's Fault	Variance in terms	Discharged immediately.
Creditor's Fault	Giving debtor more time	Discharged (unless consented).
Creditor's Fault	Losing collateral/security	Discharged to the value of the security.
Invalidity	Fraud / Concealment	The contract is void; no liability.

Exceptions (When the Surety is NOT Discharged)

• Forbearance to Sue (Section 137): Merely because a creditor does not sue the debtor immediately after the due date doesn't mean the surety is discharged.

• Release of one Co-surety (Section 138): If there are multiple sureties, the release of one by the creditor does not discharge the others.