Make sure you're logged in to your merchant account (here we use "Example Resident" as a placeholder).
Open the dropdown menu by clicking on the blue arrow pointing down, next to your avatar's name
Choose Merchant home:
From that page, select Automatic Notifications (ANS):
You should have now the Automatic Notifications configuration page opened:
Now type in the URL for your Notifications Processor (ex. https://example.com/cgi-bin/my-processor.sh) and press {Enter}}; the system should now display the 40-character-long Merchant Salt' number, showing up under the Notification URL.
Remember: Every time you change the URL, you'll get a new salt.
