Experience Certificates
No employer can deny experience certificate to any employee in India. It is as per the Shops and Commercial Establishments Act (every state has one; mostly look-alike). In law, it is known as 'Service Certificate'.
In short, even if you have not returned those IT assets, have broken that 'bond' (which has legal standing in India), went absconding, killed someone and got terminated, or whatever - you are entitled to an experience certificate whenever you ask for it.
However, relieving certificate is different. It may be issued after due process at the org, after no-due clearance and such.