Bitemarx, I think I am experiencing the same thing. NPower billing me although I moved into the house and switched to FirstUtility straight away. I called the Xoserve helpline (they maintain a register of all meters and each meter is identified by a meter point reference number, which is NOT the meter serial number). Turns out First Utility messed up and took over an obsolete meter point reference number (some properties have more than one listed but only one should be active). NPower continued to bill me as "their" MPRN had not been taken over. First Utility refunded me. I'd suggest you call Xoserve to check the listed MPRN(s) for your property. NPower and EDF can also tell you which MPRN they have for you and these SHOULD normally be the same as you only have one meter, good luck

I moved into my house several months ago and I changed gas supplier from NPower to First Utility as soon as I arrived. The bills from First Utility showed a different meter point reference number (and a different meter serial number) than the previous bills from NPower. After the first few meter readings I gave online to First Utility, they started refusing the readings. I phoned them and they said they did not supply me. I called the Xoserve helpline who told me I have two meter point reference numbers listed for the property and one of them is likely obsolete. When First Utility took over, they recorded the wrong MPRN (I know because NPower's MPRN does indeed correlate to the meter serial number written on my meter). My question is - what is the chain of events. How can First Utility start billing me and then stop (they've refunded the money now). How does their system allow them to accept an obsolete MPRN and then what triggers their systems to belatedly recognise that and stop billing me? NPower continued to bill me because "their" MPRN had not been officially taken over. A question for someone in the industry, I guess.