Question: how to change iwk ownership?
Answer: Bring photocopy SNP, first 2 page and last page (signage of seller and buyer page)
Photocopy IC.
Latest bill if any- to be safe.
Deposit-cash/card(bring cash to be safe in case card can't be use. ... 
Can do at any TNB branches.
If any outstanding bill, they will deduct from previous owner deposit.