If you are already registered as an online user and have forgotten your Canada Post User ID, please contact the Canada Post Technical Helpdesk for assistance at 1-866-511-0546 Monday to Friday, 8 a.m. to 8 p.m. local time, Saturday 9 a.m. to 5 p.m. local time, Sunday 11 a.m. to 5 p.m. local time.