There are 2 ways to set up the numbering of your invoices:

Note:

if the automatic numbering is active, it will only be valid for a determined period of time. By default, the numbering will be valid through the 31st of December of the year your Banqup account was created.

At the beginning of the year, an error may occur when creating a sales invoice: "The current numbering sequence has expired".
​→ Click here to read how to fix this

No setup is needed, you simply add the invoice number manually as you create the invoice.

Important:

when autonumbering is enabled, the order in which sales invoices are sent to customers determines the numbering order of these invoices. The creation date of the draft invoice only influences the numbering when sending multiple invoices at once.