Important Resources

If you are inexperienced with bulk mailing or ZIP+4 POSTNET bar coding, we recommend you contact your local USPS Business Center or account representative and order the following free publications.

Publication #25  A Guide to Business Mail Preparation

Publication #28  Postal Addressing Standards

Publication #49  Third Class Mail Preparation

Some USPS branches will ZIP+4 update and CASS certify your mail list for you. Unfortunately, the USPS does not support mail lists that are in Macintosh format. Many USPS branches also hold free seminars which assist you with bulk mail regulations. Contact your local USPS business representative for information.