Is it obligatory to change the name on the phone and electricity bills from that of the deceased father, or can they be left as they are with continued payment?

Utility bills (such as electricity) must be changed from the name of the deceased to the name of the homeowner or one of the heirs, in order to preserve the companies' money and prevent evasion of payment, and in compliance with laws that protect people's rights. The deceased is not held accountable for bills incurred after his death; these are the responsibility of the living consumer, because ownership ceases with death.