Get Products Free or almost free with Mail in Rebates. Mail in Rebates for Canada is an awesome way to get money back in your pocket after spending it on products you already have bought. What can you get with a mail in rebate? Well right now there's cosmetics ( specially marked packages) Cleaning products, pet food and other products such as free Itunes card with Mail in rebates, you just never know what is going to be offered next. So take your time and go through them all and see which products you can buy with in the time limit and what restrictions are on the rebate itself, Just make sure you mail it out in time.