My energy account already exists. The company holds my name, my date of birth, my address, my email address, my mobile number. They hold these details because I supplied them when I opened the account, and because the account has been active long enough that the details have been verified, used, and stored in whatever system manages the relationship between us. The relationship is established. The record is complete.

I want to change the name on an energy account. The account is mine in the sense that I am the authorised person on it. The address has not changed. The service has not changed. The relationship between me and the energy company has not changed. The name requires updating. That is the complete description of the task.