What can we help you with?

ELEX WooCommerce USPS Shipping Plugin “API Authorization Failure”


When I click “Print Shipping Label” button, I receive this error message:

API Authorization failure. User (my User ID) is not authorized to use API DeliveryConfirmationV4. [80040B1A, USPSCOM::DoAuth]

Please help me to fix this.


The USER ID is not authorized to access the print label feature.

You need additional permission for delivery confirmation (for a print label) and tracking API. For assistance, kindly contact USPS customer service.


I just realized that I can not pay for shipping labels online with this plugin: WooCommerce USPS Shipping Plugin with Print Label. I just purchased it this week. I would like to get a refund on it.

I guess I need the following plugin to be able to pay for shipping labels online: WooCommerce Stamps.com Shipping Plugin with USPS Postage.

Is that correct? So what should I do to switch from one I purchased plugin to other? Please advise me. Thank you.


For the USPS plugin, you need to pay for the postage manually. However using our Stamps.com and Easy post plugin you can pay for the postage while creating a shipment.

Note: To use our Stamps.com and Easy Post plugin, it’s necessary to have either a Stamps.com or Easy Post Account.

Swapping is not an issue, kindly let us know with which plugin you want to swap, provide us with the invoice pdf of the plugin, we would initiate the swapping for you.

Previous ELEX USPS Shipping Plugin Compatible to WooCommerce 3.0
Next ELEX WooCommerce USPS Shipping Plugin Premium Features

2 Comments. Leave new

You must be logged in to post a comment.