It is desirable that those who attend the burial, ask for forgiveness and supplicate for the deceased. The Messenger of Allah (S) said:
"Ask forgiveness for your brother and ask Allah to keep him firm; since he is being questioned now." [Ibn Majah]
It is necessary to level the earth over the grave, since the Messenger of Allah (S) commanded that. However, raising the grave about a hand span from the earth is permissible, since the grave of the Prophet (S) was raised in this manner.
It is prohibited to exhume the grave and relocate the remains, except due to dire necessity.
It is disliked to transport the body from one country to another for burial, except to one of the two sacred places; Makkah or Al Madinah, and similarly to Jerusalem. The Messenger of Allah (S) said:
"Bury those killed where they met their end." [Abu Dawud]