In order to use a full service IMB barcode, you will need to get certified with PostalOne.
Attached is an outline of steps you will need to go through to obtain the certification.
More information about PostalOne can be found here:
https://www.usps.com/postalone/
The official PostalOne guides from the USPS can be found here:
https://www.usps.com/postalone/guides.htm
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