I agree with vkokamthankar.
"DELEGATIONS OF POWER" is an important document, and it is approved by the Board of Directors.
It also defines the "Competent Authority" in respect of so many activities.
unfortunately, many small or new companies do not have such good and standard practices. They are run in ad-hoc manner.
Please do not get carried away by verbal instructions, as these can not be proved later on. Companies are bound by Companies Act and several other Acts. You may have to represent the Company or be answerable for everything on which you sign.
Better to restrict yourself or your signatures on subjects which are within the powers and jurisdiction of Astt. Manager; unless you have a specific written approval.
Failing this, you may find yourself in deep trouble in future.