$ late-payment --interest --letter
Late payment interest and reminder letter
Enter the unpaid invoice. You get the days overdue, the statutory interest and fixed compensation for the UK or Germany, and a letter ready to print or save as PDF.
> Your result
$ cat letter.txt
Your letter
$ next --step
Send the next invoice with the due date and late-payment terms on it, so the next reminder is easier.
Make an invoice with HMSK InvoiceFree, in your browser, with XRechnung export for Germany.
$ cat sources.txt