Hassle-free Billing Guaranteed Proof will send you monthly, itemized usage summary detailing all of your long distance, wireless long distance, and calling card calls – and your savings. The charges will be conveniently billed to your CIBC Credit Card. It’s that easy. Plus, if you have a CIBC Credit Card that earns you reward benefits, you will earn benefits on every dollar charged to your card4. Click here for details on CIBC Credit Card benefits. It's easy to see how much you'll save. On a monthly basis, you’ll receive a Guaranteed Proof Usage Summary detailing how much your calls for the month would have cost with each of the selected plans. The middle column on your Usage Summary always indicates the lowest cost plan for the month, as well as your total Guaranteed Proof discount - so you can easily see how much you've saved. Roll your mouse over the numbered circles below to get a detailed description of the items on your invoice.