There could also be times once you got to write off a customer invoice because they haven’t paid it. this might be because the customer’s company has gone into liquidation or thanks to a dispute. you'll write off your customer’s invoice by posting a credit note to your Bad Debts nominal ledger account. Lets look how to Sage 50 Write Off Bad Debt Invoice. Click for more info- https://www.accountinghub.co/sage-50-write-off-bad-debt-invoice/