Flats Presorting Tips


Per the US Postal Service, we can NOT presort any flats made of Tyvek or flats which utilize metal clasps to close the flap. These must all be fully paid.

For more information regarding the USPS physical standards for flats, click here.

Midwest Presort acknowledges that this data is confidential and protected. If any questions arise during the file preparations process, please click here

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