ISRlight is platform-independent (Windows, Mac or Linux) and will run on any common web browser such as Internet Explorer, Firefox, Safari or Chrome.

There is no need to install any software locally on your computer, and you can simply work with blank inpayment slips. The ISR reference number will be automatically generated and printed on the inpayment slip. There is no need to key in ISR reference numbers.

If you wish you can download a backup of the data to your PC at any time. Access to ISRlight is over a secure connection encrypted using https.

Invoice addresses

Entering invoice addresses is easy. You can also differentiate between invoice addresses for organizations and individuals.

Write invoices

All you need to do is enter the text for the invoice and the respective amount. You can create invoices with or without VAT.

Print invoices

You can create PDF invoices at the click of a mouse. You can then print them on forms obtainable from PostFinance.

Post incoming payments

You can automatically post incoming payments to your postal account by downloading the ISR file from PostFinance and then importing it.

Reminders

If invoices have not been paid on time, you can create PDF reminders with a single click. You can either print the reminders or e-mail them as PDF attachments.

More information and the registration can be found under www.esrlight.ch.