Where an opening read has been estimated rather than collected as an actual read, an issue crops up in the next billing and you get an unusually high or low bill. The reason for this is that the estimation has been poor.
The figure that is calculated uses information from the previous supplier to "agree" through the industry a read by which the old supplier can bill until and the new supplier (us in this case) can bill from.
There is a proper industry process in place to handle this issue. We require two reads from you 5 days apart. We submit this information back to the industry who then review and agree what the opening read to us should have been.
The result is that your previous supplier can rebill you to the revised closing read for them, and we can rebill you to the revised opening read from us.