We just released a small change that lets you set your own starting invoice number. This will be most useful for those of you just starting with Cliniko.
If you had invoices from a previous system that went up to invoice number 254, you could set your starting invoice number to 255 so there are no clashes.
You can of course still use this if you've already been using Cliniko and just want to jump the numbers ahead a bit. Possibly if you don't want patients knowing they're your 7th patient.
You can find this new setting in Settings > Invoice Settings.
When creating a new invoice, Cliniko will either use the number you set there, or one above your last invoice in Cliniko. Whichever of these is greater.