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Email: support@johnwicki.com
316 N Lincoln St, Ypsilanti, MI 48198
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Letter and Post Card Standards
https://pe.usps.com/text/qsg300/q201.htm?q=letter+standards&t=H&s=R&p=1&c=DMM|QSGFlat Standards
https://pe.usps.com/text/dmm300/201.htm?q=Flat+standards&t=H&s=R&p=1&c=DMM|QSG#ep1096318Booklet Tabbing Requirements
https://pe.usps.com/text/dmm300/201.htm#ep1084261Non-Profit Authorization Forms
http://about.usps.com/forms/ps3624.pdf