We see many people posting RIP in an event of somebody's death. It is so natural to write and read that many of us do not even think for a second, if what we are writing is right or not. RIP, which is Rest In Peace is a term that is appropriate when either the person who has died or the person who is giving condolences is a Christian or Muslim (or any other religion) which believes in maximum one time resurrection.
We Hindus believe that bodies are just like clothes, which are changed periodically. The soul always live on. It just gets transferred to another body.