[buymycards]

The barcodes on these envelopes are not package tracking barcodes. They are Intelligent Mail barcodes, which can only be read by the processing machines. The clerks cannot scan them and the carriers cannot scan them. You will never have an actual "delivery" scan or an acceptance scan.

If you subscribe to the USPS Informed Delivery, you are told what mail you can expect today. This comes from the IMB barcode that is scanned at the processing plant. The IMB's and the machines are very accurate and 99% of the time you will receive the mail that is pictured on your Informed Delivery email.

If you look at your incoming mail you will see that all of the letters have these IMB codes sprayed on them. A black barcode on the front and a pink barcode on the back.