"We are writing you to please permit the family members to give Afzal Guru a proper dignified last rites in accordance with the religious traditions.
"If you could inform us when the family members can perform their Namaaz-e-Janaza, we would appreciate it," said the letter, a copy of which is with IANS.
"We do not wish to make it a political issue in an atmosphere which is already volatile but the family members, as citizens of India, have a right, which must be respected," the letter said.
Guru, convicted for his role in the attack on Parliament in 2001, was hanged in the jail at 8am after his mercy plea was rejected by President Pranab Mukherjee February 3.