You can pay invoices online now (with or without a PayPal account).
The PayPal window will appear with a zero amount. Enter the amount shown on your invoice in the “Item price” field using a period for a decimal point. Click on “Continue”.
For english payment instruction (PDF)
Client Account Services
6700 Jarry Street East, Montreal, Quebec H1P 0A4
Tel.: 514-723-5600, Ext. 5666
Business hours: Monday to Friday, from 8:30 am to noon and from 1:00 to 4:30 pm.