Steps
- Open Invoice Settings. In the back office sidebar, open Settings and click Invoice Settings. The Invoice Schemes tab lists your schemes with their prefix, start number and invoice count.
- Click Add. Click Add to open Add new invoice scheme.
- Pick a format. Choose FORMAT: XXXX for a plain running number, or the year-based format, such as 2026-XXXX, that starts with the current year.
- Name the scheme and add a prefix. Enter a Name, such as Downtown, and an optional Prefix, such as DT-.
- Set the numbering. Enter Start from, the first number to use, and Number of digits. With 4 digits, invoice 7 prints as 0007.
- Check the preview. The Preview shows exactly how the next invoice number will look.
- Save and assign it. Tick Set as default if this scheme should be used where none is picked, then click Save. Assign the scheme to a location under Settings › Business Locations.
One scheme per store
A separate scheme for each location, such as DT- and WE-, makes it clear which store an invoice came from and keeps each store's numbers in sequence. Set the scheme on each location, or in its receipt settings.
If you are moving from another system, set Start from to one more than your last invoice number so the sequence carries on.
Frequently asked questions
How do I change the invoice number in SeroPOS?
Open Settings › Invoice Settings and edit the scheme on the Invoice Schemes tab. Change the Prefix, Start from or Number of digits and check the Preview. Make sure the location uses that scheme under Settings › Business Locations.
Can invoice numbers restart each year?
Choose the year-based format, such as 2026-XXXX, so every number carries the year. Check the Preview after the new year starts to confirm how the scheme continues before you rely on it for your records.
Can staff pick the scheme at the till?
Yes, if you allow it. Tick Show invoice scheme on the POS tab of Business Settings, and staff can choose a scheme on each sale. Otherwise the location's scheme is used.