When an Indian company listed on a foreign stock exchange gets delisted, its American Depository Shares (ADS) can be converted to ordinary equity shares. For instance, Tata Motors' delisting from the New York Stock Exchange allowed ADS holders to convert their shares. Here’s how to do it:

1. Set Up Accounts in India

   • Open a DR-type Demat, Ordinary Demat, and Trading account.
   • A DR-type Demat account holds equity shares issued upon cancellation of Depository Receipts and is used solely for receiving such shares. These shares are then transferred to a normal Demat account, allowing closure of the DR-type account.

2. Complete US Formalities: You would have received an intimation from the designated agency on the proposed conversion. Contact the designated points to initiate the ADS conversion process. 

3. Submit Receipt-in DIR

   • Fill in the DP ID, DP Name, Client ID, ISIN, Stock Name, and Quantity on the DIR form.
   • Obtain the necessary details, such as DP ID and ISIN, from the NSE website or your Depository Participant.

4. Transfer Charges: To complete the transfer, pay the required off-market charges to the designated agency in the foreign country, either directly or through your Trading account. Charges vary based on the stock's last closing price and are payable in Indian Rupees.