How do I cancel an invoice and reinstate the order?

Scenario:

Let's say invoice #10 was mistakenly created, and at the same time, a duplicate order (#20), was also created with the same details, causing you to delete the duplicate order (#20). Later, you realise that order #20 is the correct one, while invoice #10 should not have been issued.

In this case, the best approach is to:

1. Cancel invoice #10
2. Reinstate order #20
3. Invoice order #20 as the final and correct version.

To cancel invoice #10:

1. Go to Sales, then select Invoices & credits.
2. Search for and click on the invoice number (#10).
3. Click Actions (dropdown menu), then select Redo invoice.
4. The system will:
   • Credit the invoice
   • Return the products back into stock
   • (If applicable) Reverse the serial numbers back into stock
   • ⚠️Note: After this step, the invoice will be deleted and no longer accessible.
5. The order will be reopened as a redoing order, allowing you to redo the entire order. In this case, however, you don't want to keep this order, so click More, then select Cancel order.

To reinstate order #20:

1. Go to Sales, then select Sales orders.
2. Search for and click on the sales order number (#20).
3. Click +Un-cancel.

You can now process the order as usual and assign any necessary serial numbers.