HOW DO I CHANGE MY NAME WITH MY ISP
How do I change my name with my ISP?
To inform your ISP that you have changed your name, you should send your signed Deed, and a covering a letter stating your account number or reference, name and full postal address.
The TalkTalk Group
PO Box 346
PO Box 333
Sky Subscriber Services
PO Box 43
Orange Customer Care
Orange UK Plc
PO Box 486
* by subscriber size (correct at the time of writing).