Case Note & Summary
The dispute arose from a transportation contract for iron and steel materials between Tamil Nadu Electricity Board (appellant/defendant) and N. Raju Reddiar & Anr. (respondent/plaintiff). The Board invited tenders for transportation during 1.9.1978 to 31.8.1979. The plaintiff submitted a tender on 12.7.1978 along with a letter dated 11.7.1978 containing a handwritten insertion: "I have quoted my rates for each slab and add for every extra one and part thereof". The plaintiff alleged that the contract was on multi slab basis, while the Board contended it was on single slab basis as per the written tender note stating only one rate should be quoted for various lengths and sizes. The plaintiff transported 1,73,78,821 metric tonnes of material and submitted bills in November 1979, but the Board delayed payment, leading to a suit for recovery of Rs. 46,08,820 with interest at 18% per annum. The single judge of the Madras High Court framed three issues. On issue 1, it held that the rates must be calculated on single slab basis, despite finding that the handwritten portion in Exhibit P-1 was present at tender submission. It rejected the plaintiff's reliance on other tenders and recommendations. On issue 2, it held that the alleged shortages were not established. On issue 3, it found considerable delay in payment on the part of the defendants. It decreed Rs. 9,31,157.63 with interest at 12% per annum from 1.1.1980 till decree and 6% thereafter. On appeal, the Division Bench reversed, relying on the handwritten portion and the conduct of Superintending Engineers who had passed some bills on multi slab basis, and held the plaintiff was entitled to multi slab freight. The Board appealed to the Supreme Court. The main legal issues were: (i) whether the contract was on single slab or multi slab basis; (ii) whether the handwritten portion in Exhibit P-1 was originally part of the tender or a subsequent interpolation; and (iii) whether extrinsic evidence was admissible to vary the terms of the written contract under Sections 91 and 92 of the Indian Evidence Act, 1872. The appellant argued that the handwritten portion was a subsequent interpolation because it bore no signatures and the certified copy dated 11.7.1978 predated the tender submission on 12.7.1978, which was impossible. The acceptance note clearly indicated single slab. The respondent argued that there was no issue on interpolation, that DW-1's admission supported multi slab, and that the Board had acted on multi slab basis as per Exhibit P-39. The Supreme Court found force in the appellant's contentions. It held that once a contract is reduced to writing, Sections 91 and 92 bar extrinsic evidence to prove its terms or intention except in cases of ambiguity or incompleteness. The court found the handwritten portion was not present at tender submission because no signatures were there and the date discrepancy was fatal; it was inserted later with connivance of Board officers. The conduct of some engineers could not override the written contract. Accordingly, the court held the contract was on single slab basis and restored the single judge's decree, setting aside the Division Bench judgment.
Headnote
A) Evidence - Admissibility of Extrinsic Evidence - Once a contract is reduced to writing, parties cannot lead oral or other documentary evidence to prove its terms or intention beyond the written instrument - Indian Evidence Act, 1872, Sections 91, 92 - The Supreme Court held that the written contract between the parties governed the freight rates; oral evidence is permissible only when the written contract is ambiguous or incomplete and the additional terms are not inconsistent with it. The plaintiffs' reliance on a handwritten letter and subsequent conduct was barred by these provisions. Held that extrinsic evidence could not convert single slab rates into multi slab rates (Paras Not mentioned). B) Contract Law - Interpretation of Tender Terms - The terms of a written tender and acceptance must be construed as they stand; a tender note stating only one rate should be quoted indicated single slab basis, not multi slab - Indian Evidence Act, 1872, Sections 91, 92 - The court found the acceptance note and agreement pointed to single slab; the handwritten expression "for each slab" did not alter the contract because it was not part of the original tender. Held that the contract was on single slab basis. C) Evidence - Documentary Evidence - Authenticity of Handwritten Insertion - Lack of signatures and chronological impossibility (certified copy dated 11.7.1978 before tender submission 12.7.1978) established interpolation - Indian Evidence Act, 1872, Sections 91, 92 - The Supreme Court rejected the trial court's finding that the handwritten portion was present at tender submission; it held the insertion was made later with connivance of Board officers. Held that the handwritten portion in Exhibit P-1 was not part of the original tender. D) Administrative Law - Conduct of Public Officials - Actions of Superintending Engineers in passing some bills on multi slab basis do not determine contractual terms when the written contract is unambiguous - Indian Evidence Act, 1872, Sections 91, 92 - The court held that such conduct cannot override the written contract; the Board's earlier payments on multi slab basis did not estop it from relying on single slab. Held that the Division Bench erred in treating such conduct as determinative.
Issue of Consideration
Whether the freight rates under the transportation contract were agreed on multi slab basis or single slab basis; whether the handwritten portion in Exhibit P-1 was originally part of the tender or a subsequent interpolation; and whether extrinsic evidence was admissible to vary the terms of the written contract.
Final Decision
The Supreme Court allowed the appeal, set aside the Division Bench judgment, and restored the Single Judge's decree. It held that the handwritten portion in Exhibit P-1 was not present at the time of tender submission but was subsequently inserted with connivance of Board officers, and therefore the contract was on single slab basis. Extrinsic evidence was barred under Sections 91 and 92 of the Indian Evidence Act, 1872 to vary the written contract.
Law Points
- Written contract prevails over extrinsic evidence
- Oral evidence barred to vary written terms under Sections 91 and 92 Evidence Act
- Handwritten insertion lacking signatures and with date discrepancy cannot establish original tender terms
- Contract interpretation limited to written instrument
- Conduct of some officers cannot alter express contract terms
- Multi slab basis not accepted without clear contract term
- Delay in bill settlement attracts interest
- Findings on interpolation must be based on signatures and chronology


