No, you do not need to contact your current supplier for the switch to take place. Your new supplier will liaise directly with your old supplier to agree on a switch date. You will be asked for meter readings that will be used to both open your new account and close your old one. Your old supplier will send out your final bill to close your account. As soon as you have paid your final bill it is recommended that you cancel any direct debit you may have set up with your old supplier to ensure no more payments are taken. Ofgem makes sure suppliers cooperate to make your switch as easy as possible.
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