What is the criterion for mailpieces in an automation price letter-size mailing to be compatible with the Intelligent Mail barcode?

The criterion for mailpieces in an automation price letter-size mailing to be compatible with the Intelligent Mail barcode is that all must bear a barcode. This requirement is in place because the Intelligent Mail barcode (IMb) is designed to streamline mail processing and improve delivery efficiency. By ensuring that all mailpieces include the IMb, postal services can utilize advanced sorting technology, track the mail more accurately, and provide detailed information about the mail's journey. This uniformity in the application of the barcode enhances logistical operations and fosters consistency in service standards, leading to improved reliability for both senders and recipients.

Other choices may suggest varying levels of compliance with the barcode requirement, but they fail to recognize that comprehensive integration of the IMb across all pieces is essential to capitalize on its benefits fully and to adhere to postal regulations regarding automation pricing.