If a conversion bill only has fees on or if a fee earner is no longer available on a bill that needs credit noting, then a minus bill can be produced to contra the original bill.
This can be done by following the below steps:
From the Accounts Desktop go to the postings area.
Select the Bills tab.
Put in the matter and date.
Don't select any time or disbursements, just put a manual minus profit cost figure for the value you require.
Select Debtor and allocate against the fee earner that was on the original bill or a new one that is still with the firm if the fee earner has been deleted/ or not in use.
Select OK.
Select OK/Next.
Put in the correct details and select Post bill.