In Rounded, you can choose one of two invoice and quote numbering styles in Settings → Numbers and names, then click Save.
Simple sequential: one continuous number across all clients (next invoice is always +1).
The first invoice starts at 00001, but you can edit a draft invoice to start the sequence at any number (example: set it to 001001, and the next will be 001002).
Add client prefix,: each client gets their own prefix, and numbers run sequentially per client.
The prefix is usually the first 2 or 3 letters of the client name, and you can change it in the client’s main record card.
Remember to download the Rounded mobile app!