In order to establish the identity of the customer, Bank need to rely on independent sources of documents. Permanent Account Number (PAN) card is one such document prescribed in the KYC policy of the Bank to verify the identity & signature of the customer. PAN card is a statutory document, which helps customers in getting TDS benefits etc. However, it has been observed that your PAN is not updated in Bank records. Since PAN has become a popular document & is necessary to be quoted for investment & other purposes, you might have obtained PAN card after the account has been opened but have not updated the same in the banking records.
In order to ensure better taxation/ KYC compliance & for updating the records , it is necessary that PAN duly attested by the branch is available in the Bank records.
It may also please be noted that in case PAN is not updated in Bank records, Bank is bound to cut TDS at higher rate of 20%. Further TDS certificates issued will not carry PAN and you shall not be able to claim the refund of TDS from Income Tax dept. , as also we had not reported these transactions in e-TDS returns due to non availability of PAN.
If you have not obtained PAN so far kindly obtain the same as soon as possible (procedural details available in website http://incometaxindia.gov.in) and submit the self attested copy of PAN to IDBI Bank Ltd. at the earliest, by quoting your Customer ID number.