The original contract need not be performed if there is an alteration, recession, or novation. Let's understand these terms in detail:

Alteration of Contract:
An alteration of a contract means a change made to the terms of the original contract. Such changes may be in terms of the price, delivery date, quality, quantity, etc. Alteration of a contract is only possible if both parties agree to the changes. Once the changes are made, the original contract becomes void, and the new contract comes into existence.

Recession of Contract:
Recession of a contract means the cancellation of the contract. It takes place when one party does not fulfill its obligation, or there is a breach of contract by either party. In such a situation, the aggrieved party can cancel the contract and claim damages for the breach.

Novation:
Novation means the substitution of a new contract for an old one. It takes place when both parties agree to substitute the old contract with a new one. Novation requires the consent of all parties involved, and the new contract must be in writing.

All of these:
If any of the above situations arise, the original contract becomes void, and the parties are no longer bound to perform their obligations under the original contract. The new contract or the altered terms of the contract will govern the relationship between the parties.

In conclusion, the original contract need not be performed if there is an alteration, recession, or novation. These situations arise when there is a change in circumstances or a breach of contract, and the parties agree to substitute or cancel the original contract.

In all the above contract original contract is cancelled and new contract is formed.