Process for Physical Delivery in F&O

What if my shares are blocked for SAM, in case I choose to take delivery in the contract of the same underlying?

You will have to unblock the shares in case your shares are blocked/ pledged as margin. The Shares required in your Demat account should be available in free balance for the physical delivery marking to happen successfully. The shares should not be blocked for any other requirement and your demat account should not be in freeze/suspended or such status where blocking / debit of shares cannot take place; else your positions will be squared off in the EOS process and will not be kept open for taking delivery.