① Offer + Acceptance
Creates agreement. Acceptance must be absolute.
② Legal Intention
Business = yes. Social/family = no.
③ Consideration
Something in return. Past/present/future.
④ Capacity
18+ years, sound mind, not disqualified.
⑤ Free Consent
No coercion/fraud/mistake/undue influence.
⑥ Lawful Object
Not illegal/immoral/against public policy.
⑦ Not Void
Not declared void by law (wagering, etc.).
⑧ Certainty
Terms must be clear. Vague = void. §29
⑨ Possibility
Act must be possible. Impossible = void. §56
⑩ Formalities
Writing/stamp/registration where required.
Example
Ramesh (25, sound mind) offers to sell his car to Suresh (22) for Rs.3 lakhs. Suresh accepts freely. Rs.3L is lawful consideration. Selling car is lawful. All 10 essentials present → VALID CONTRACT ✓