When you try to send an invoice in Bonsai, it is usually sent to the default client contact. However, you can manually add more recipients to the invoice by clicking the 'Add Recipient' button on the invoice.

This gives you the option to select the other contacts in the client record and also manually input an email address on the go.

Now to simply this feature, we enabled a feature where all the contacts on your previous invoice will automatically be copied on your subsequent invoices without you having to manually add them every time.