2026-06-30 – version 5.6.0
* Add – Optional shipping insurance and signature confirmation, offered to customers as selectable rates at checkout and priced by USPS.
* Add – New filters woocommerce_shipping_usps_skip_item_box_packing and woocommerce_shipping_usps_package_requests to let developers customise box packing and package requests.
* Fix – Service commitment delivery time shown in USPS rate labels is now scoped to the selected rate, fixing inconsistent visibility when a per-rate woocommerce_shipping_usps_should_show_service_commitment filter is used.
* Fix – Round lbs-to-oz weight conversion in letter-rates requests to prevent USPS error 030004 on integer-oz boundary weights.
2026-06-22 – version 5.5.8
* Fix – First Class Mail rates incorrectly returned for carts that aren’t fully covered by the First Class quote (any packing method).
* Fix – Box packing no longer adds the discarded First Class fallback surcharge to the other shipping rates when the First Class quote can’t cover the full cart.