ℹ️ Note: This isn't a recent change. Invoice numbering has worked this way since March 2025.
What determines my invoice number?
By default, your invoice number matches the sales order (SO) number it was created from.
Why do some invoice numbers have a suffix, like -1 or -2?
Sutton adds a suffix whenever you create an invoice through certain paths. The suffix isn't tied to whether the invoice covers the full order or only part of it. It's tied to which invoicing path you use.
Which invoicing paths keep the number without a suffix?
Two paths always keep a clean invoice number:
From the SO table, select Invoice all items in the Invoice column.
From the Shipment table, select Invoice this shipment in the Invoice column, but only when every item in the invoice was included in that shipment.
Any other invoicing path adds a suffix.
Does invoicing by quantity always add a suffix?
Yes. If you invoice using Invoice by quantity, the invoice always gets a suffix, even if you fill in every line item and invoice the full order amount in one pass.
Invoice numbering, at a glance
Your invoice number is only suffix-free when you invoice all items directly from the SO table, or invoice an entire shipment from the Shipment table. Every other invoicing path, including invoice by quantity, adds a -1, -2, and so on, regardless of whether the invoice covers the full order.
If you have additional questions, please reach out to your Customer Success Manager or contact us at [email protected].