There are different reasons why a transfer debit may appear on your invoice, some examples are:
1. A debt has been transferred from another contract (eg. an old address and you have just moved)
2. There has been a credit transferred between accounts and the debit is appearing on the original contract
3. A refund has been completed post transfer of credit
To ensure that we're giving you an answer that is relevant to your account, we'll need you to get in touch with our web chat team here.