On this page, you can find out how to appropriately and correctly set invoice numbering.
- Two different invoices must not have the same number. Invoice numbers are unique, which make it possible to search for and unambiguously identify individual invoices.
- The maximum recommended length of an invoice number is 10 characters. This recommendation stems from the fact that banks and business applications usually expect that the variable or specific symbol on an invoice has a maximum of 10 characters.
- You can choose the invoice numbering format according to your needs, but it is necessary to stick to it.
- When generating invoices, you can set the default invoice number for a given invoice group in Opening invoice number / SS (or Opening VS)*.
* Note: The way the field is named (either Opening invoice number / SS or Opening VS), depends on the setting of the vs_ss_exchange key in InvoicingSettingsGeneral. If the value = 0, then Opening VS is displayed. If the value = 1, then Opening invoice number / SS is displayed. -
Each invoice group has its own numerical series.
Example:
Invoice group 1 Opening invoice number / SS (or: Opening VS) 2018100001
Invoice group 2 Opening invoice number / SS (or: Opening VS) 2018200001 - If it is even remotely possible, the numerical series should be pending, without interruptions. Thus, it should not happen that invoice No. 2018100003 follows invoice No. 2018100001.
- If you enter 2018000001 as the opening number of a series, then this number is assigned to the first invoice. Whenever a new invoice is issued, its number is the number of the last invoice increased by 1.
- Numerical series are, as a rule, changed at the beginning of every year. For example: In 2017, the opening number was 2017000001, while in 2018, it was 2018000001.
- The opening number of a new numerical series for a given invoice group must always be greater than the highest used invoice number for a given invoice group. If the opening number of a new numerical series were lower, the system would use the highest used invoice number and increase it by 1.
- You need to adhere to the set numerical series not only when generating bulk invoices, but also when issuing individual invoices.
Change of numerical series for invoicing