New Delhi, Aug. 4 -- Nearly a fifth of the names on the old electoral roll in Delhi could face deletion as the Special Intensive Revision (SIR) enters its final stretch, officials involved in the exercise said on Monday.

The people cited above, who asked not to be identified, said the deletion rate is expected to be around 20%, as large chunk of Delhi's population are migrants, who shift residences without updating their addresses or transferring their names to electoral rolls in other states.

"Booth level officers (BLOs) are mandated to visit the residences of electors at least three times. The officers, when not met with a response at an address, slip the forms beneath the closed doors and even paste notices saying that their names co...