We will send you a contract confirmation once your local distribution system operator has confirmed the start date of the contract. If you have a valid fixed-term contract with another electricity seller, your contract with Helen will start after it has ended. The information in the contract confirmation is valid at the time of sending. If you have notified us of changes, they will take effect on the agreed date. For example, a new billing address is updated for the contract when the new contract enters into force.