A mailing permit is permission to use a certain postage payment method for bulk and commercial mailings. Instructions for applying for a mailing permit are included under each method of payment.
There is no fee to apply for a permit to mail with precanceled stamps or a postage meter.
There is a fee to apply for a permit to mail with permit imprint. This one-time only fee pays for setting up your permit imprint account. The permit imprint application fee is due when you turn in your application for a permit imprint.
You must hold a permit and pay an annual mailing fee at every Post Office where you want to enter and pay for commercial mail.
- Directly from the USPS Website
http://pe.usps.com/businessmail101/post ... permit.htm