Most banks require their new customers to bring electricity bills to regularise their bank accounts (including those opened online). While the bills are easy to get from one's landlord, neighbour or friend, they don't say much about one's identity and current location. They only provide a guarantor (the person whose name appears on the bill) for the account. A tenant may move out tomorrow.
A PVC (permanent voter's card) is more useful in tracking people down. It reveals the person's full names and date of birth, which can be entered into the INEC CVR portal to reveal the person's current address and polling unit even if he has moved. It is easy for a wanted person to be picked up (with some help from people living near the polling unit).
On the other hand, a wanted person who has moved after using his landlord's electricity bill cannot be tracked. It is the innocent former landlord who will be asked questions he can't answer. It is safer to offer your electricity bill to your fellow landlord (a permanent neighbour) who doesn't use electricity than to your own tenant ( who may move to an unknown destination later). More and more people are dumping the erratic electricity for generators and solar energy.
Banks should, please, move with the times.