I am a little late here, but have been receiving the same message intermittently on one specific address I am sending to. By any chance, Between the person's confirmed shipping address do they have a foward slash (/) between their five digit and four digit zip code (for example, 01234/0123 instead of 01234-0123). I just noticed out of all the people I have shipped to recently this was the only person to have a forward slash. Before receiving the error I was printing labels fine, and after getting the error I was able to print other shipping labels fine, but I receive that same error message for that one person. I already emailed Paypal tech support about the issue and also emailed the member, but may have to seek USPS website out. Changing the confirmed address also from a forward slash (/) to a dash (-) states I would not be covered under Paypal's Seller Protection Policy. I know many programming languages do not know how to interpret a forward slash (/) when it expects another character to be used, so hopefully they can fix it on paypals side. Just curious though to see if the person your attempting to create the shipping label also has a forward slash in the zip code information?
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