Q. Why does the USPS accept reverse sequencing for basic carrier route Standard Mail when an approved product is used?

A. Under the new guidelines, high density and saturation mailings that are found to be out-of-sequence or in reverse sequence are charged additional postage. For basic carrier route mailings (e.g., 10 or more Standard Mail pieces to a carrier route), there is no additional postage charged for mailings found in reverse sequence. This is because, unlike high density and saturation, basic carrier route mail is always cased, and reverse sequence has minimal impact.