Postal Bulletin 22206 > Pull-Out Information > Other Information > Toll–Free Number Available to VerifyCanadian Money Orders
The Canada Post Corporation is now providing a toll– free number that cashing agents can call to verify the validity of Canadian Postal Money Orders. The number is 800–563–0444.
This toll–free number is printed on the back of the Canadian Postal Money Orders.
— Mail Theft and Violent Crimes Group,Postal Inspection Service, 5-10-07