In Canada you can receive a discount for large Lettermail mailings with Canada Post and for large direct mail advertising projects. An iAddress certified mailing will be eligible for these discounts if they meet Canada Post requirements. View the current Personalized Mail rates
You’ll have to apply for a Canada Post account and complete and submit a credit application to CPC (Canada Post Corporation). After you receive a customer number, apply for a permit number for each type of mailing. Once the mailing has been prepared, pack in appropriate containers. Complete a Statement of Mailing (SOM) and take the mailing to RVU or another approved depot. It is highly recommended that you contact a mail preparation expert or lettershop to assist with this if you do not have experience already in this area.
Sign Up for a new Canada Post Account here: https://www.canadapost-postescanada.ca/cpo/mc/app/prm/signupstep1.jsf
For USPS discounts, you will need to obtain a Mailer ID. It is best to contact the USPS depot where you will be inducting your mail as every depot has different rules and regulations. Here is the link to the Business Customer Gateway: https://gateway.usps.com/eAdmin/view/knowledge?id=MID
And again, we recommend contacting a mail preparation expert or lettershop to assist if you are new to this.