It's automatic - PP and Ebay are the same entity so they can be streamlined on occasion. You will also get an email when the hold is released. From time to time there may be a delay but I have always found it to be pretty instant.
Paypal covers INR (item not received) for purchases outside of Ebay so as long as you provide tracking they will usually side with the seller.
If you mean leave feedback before you send the item then this is unlikely to work and will just get you reported for feedback extortion. I certainly wouldn't put anything like that in the description.
CaptainJack
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