Invoice reference numbers

If you are issuing a large number of invoices, reference numbers can help associate wire transfers with the correct invoice or client. The reference numbers Sliptree generates are compliant with the Estonian reference number standard.

Reference numbers are disabled by default, but can be enabled for Estonian companies, by navigating to Business Settings > Settings, to the Invoice reference number section.

There are 3 options to choose from:

• Disabled - reference numbers won't be generated for invoices
• Invoice-based - reference number will be generated based on the invoice number
• Customer-based - reference number will be generated based on the customer number (ID).