07-17-2023 09:58 AM
I have tried several times this morning to print a USPS click n ship label and I keep getting this error. It's not the ship-to address because I've shipped to the same address many times. I've tried a few times so it's not the mail class/extra service combination either.
Tracking Number Error - Invalid mail class/extra service combination.
07-17-2023 10:07 AM
At what point did you get stuck? Before or after purchase? I ran a test and was able to get up to the "Add to cart" step with no problems.
07-17-2023 10:08 AM
What mail class are you trying to purchase?
What extra service did you add, if any?
Not enough info at this point to know if it's a problem with your selections or a broader USPS site issue. If you don't want to troubleshoot, go somewhere else to purchase the label like through the eBay order, through pirateship.com or through paypal.com/shipnow
07-17-2023 10:08 AM
Thank you. I logged out and logged in again and it worked. Please disregard.
10-01-2023 10:07 AM
Mine was when I tried to check out to pay
10-10-2023 10:40 AM
Same issue...I just googled it and found this. My issue is directly on the USPS website and I'm not adding any extra service.
10-10-2023 11:09 AM
Same issue. Cannot ship a package priority mail, no added services.
04-15-2025 02:18 PM
I am unable to pay for and print a click & ship USPS label - it's making me crazy!!!
05-09-2025 09:16 AM
I fill out the name and address, click "Next" button and get JSON error. Ever since the "New and improved" version came out I've had this problem. Figures.
05-09-2025 09:18 AM
I've narrowed it down to when I use my address book, it causes the error. Great feature!!!! Thanks, USPS!!!!