In Ayyavazhi
In Ayyavazhi the body of the dead is buried, unlike in Hinduism.
The body is buried in a position that faces to the geographic north in a Padmasana position. No boxes such as coffins are used. The body is just placed inside and covered by sand or Namam (sacred soil which is used as Thirunamam in Ayyavazhi). This practice is done in belief that the deceased is performing austerity for the unfolding of Dharma Yukam. There was also a belief that the body of a person who was free from birth will not decay, and will be preserved as it is. Then as the Dharma Yukam unfolds, Vaikundar will blow a Conch shell and these people will rise from the grave. This scenario resembles the Last Judgment in the Abrahamic religions.
Read more about this topic: Vedic Rituals After Death