I just tried to print a wrapper with postage, and got the message that printable postage could not be used for that address.  However, it let me print delivery confirmation for the same address.  I thought that not being able to print postage for a particular address meant that the address wasn't in the exact format that the USPS likes, but that would also apply to DC wouldn't it?   I'm wondering why I could print DC, but not postage.  I tried to find something about this in the help section, but didn't see anything.

Hi Danielle, I would think that postage would print, especially if the DC worked.  Was the weight right in the system?  (Trying to think what else would be "off")

The weight seemed right.   The message I got was something like, "Printable Postage is not available for this address at this time."  I didn't think DC would work either &  I was really surprised that it let me print DC.   It's a mystery...

I would have thought it was a non verified USPS address if the postage did not print. Just out of curiousity I would check the address on the USPS site to see.