Hi Aarti,
Mr. Atul said correct, it doesn't matter, whether you mention termination clause in the letter of appointment? Every establishment is supposed to follow certain procedures in case of termination, if your establishment is covered under Shops&Establishment Act, then go through the Act for termination procedures. Similarly if it is under factories Act, then you may follow the same procedure laid down in the Act.
However, for any reason every employee should be given an opportunity to give explanation or enough time to prove his performance in writing.
In the aforesaid case, you are supposed to pay him notice / salary for 30 days. Other wise, you may have to face legal implications.
You may be hurry to hire but be careful to fire....
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vishwanath