Hi enquiries15,
I would firstly recommend sending an invoice reminder to all customers who currently have open invoices with you. You can edit the invoice reminder message in Accounts and Settings, then in the Sales tab, under the Reminders section. Then, you can use the Batch Actions button in the Invoices page to batch send invoice reminders that have the updated bank account details in them.
For customers without a current open invoice, I would recommend editing your invoice template message with the updated bank account details, using symbols such as an asterix to draw attention to the new details. The next time you send an invoice to the customer, it will show the updated details.
Bonny
