Shipping Problems

Problems with calculating a shipping rate

My shipping is figured wrong, it is 3 pounds too heavy

Any shipping module that uses weight for the calculations also takes into account a built-in Tare weight. The Tare setting (configurable in your store Admin) adds extra weight to compensate for packaging materials.

To change the Tare, go to Admin > Configuration > Shipping/Packaging You will be able to change the Tare on this screen.

You can set either and/or both a percentage or weight for Tare and Large Package.

Entered as percentage:weight


Disabled completely = 0:0
10% + 1lb = 10:1
0% +3lb = 0:3
5% + 0lbs = 5:0

This way both the Tare for small to medium packages has a flexible option of percentage + weight and the Large Package increase has an option of a percentage + weight.

Sorry, we are not shipping to your region at this time.

This message usually occurs when you have no available shipping modules for that customer’s address.

A module is unavailable for one of two reasons: it’s not installed or it’s installed but has a Shipping Zone restriction set on it, and the customer’s shipping address isn’t in that specified zone.

Or maybe the order qualifies for Free Shipping, but you don’t have the freeshipper module installed.

The USPS module is returning an error when I try to checkout

If you are receiving this error:

An error occurred with the USPS shipping calculations. If you prefer to use USPS as your shipping method, please contact the store owner.

You need to call or email USPS and have them move your account to the production server.


Still have questions? Use the Search box in the upper right, or try the full list of FAQs. If you can't find it there, head over to the Zen Cart support forum and ask there in the appropriate subforum. In your post, please include your Zen Cart and PHP versions, and a link to your site.

Is there an error or omission on this page? Please post to General Questions on the support forum. Or, if you'd like to open a pull request, just review the guidelines and get started. You can even PR right here.
Last modified September 13, 2020 by Scott C Wilson (cd1b4fd).