Dear Prakash,
A common seal is not such a common thing to be used by one and all of the company executives. The common seal should be affixed to any instrument only by authority of a resolution of the Board or a committee authorized by the Board. The common seal should be affixed in the presence of managing director or any two directors, and the company secretary or any other person as the Board may authorize for the purpose. The Articles of Association may provide for affixing of common seal in any other manner. Also, the persons in whose presence the seal is affixed should sign every instrument to which the seal of the company is so affixed.
Just think, whether each and every appointment is approved by the Board of Directors or the appointment order is required to be signed by the MD or Directors of the Company?
Affixation of the common seal is required to be made only on certain specific documents, share certificates and share warrants issued by the company.