Once an address list has gone through a standardization process, look at the output of the address as it appears on the mailpiece, insert, or address label. Some postal addressing standards relate to format and readability factors. A standardized address should also be machine readable so it can be processed on high-speed optical character readers (OCRs). Publication 25, Designing Business Letter Mail, contains specifications for properly formatting and printing delivery address information on letter mail. Following these readability guidelines for letter mail that has not been barcoded helps to ensure successful OCR processing. Some important elements affecting machine readability are contained in Appendix A of this document. For complete information, however, we recommend you obtain a copy of Publication 25 from your local Post Office. If your mailpieces will be submitted for automation rates, the requirements in the DMM must be met.