What happens if my account is in credit with Southern Water account?

In most cases, any credit balance on your Southern Water account will transfer to your new One Bill, and will show on your first bill from South East Water.

If it isn’t possible for the credit balance to be moved to your One Bill, for example when customer details haven’t been matched or there is outstanding court action, then Southern Water will contact you to let you know and you’ll need to arrange a refund directly with them.