Hi there,
This question was marked as resolved but there were no replies.
I am replying to make sure you are not still having issues.
A bubble mailer, if the height is less than 3/4 inch, would be consider an envelope. USPS has no tracking for First Class mail envelopes. The labels have a different format and there is no tracking number.
You can read more about it on the Shipping Guide.
> When selecting the shipping rate USPS – First Class Mail states it includes USPS tracking.
USPS First Class Mail should not display the option “Includes USPS tracking” for that type of envelope.
If you are using the latest version of WooCommerce Shipping and Tax and seeing the option “Includes USPS tracking”, please submit a ticket using this form, so that you can get further help.
Hope that helps!