Hai Meher,
the independence of the auditors are of several folds,
if you remember, an auditor cannot hold shares in the company under audit or its subsidiaries or holding companies, either by himself or through his relatives.
None of his relatives should be working in the company, if working he independence would be lost.
like wise if your go through the conditions for being appointed as an auditor, eligibility for being appointed as an auditors, rights and obligations of the auditors, you would be able to get the list.
if you could not find the same, i will provide you the required format, and it should be signed and submitted to the audit committe for each time auditor was appointed or reappointed and for each year.