WooCommerce USPS Shipping Method 5.5.4

[netman]

A new update for WooCommerce USPS Shipping Method 5.5.4 is now available for free download. Big thanks to the contribution from our member @netman !

2026-04-13

* Fix - Correct large envelope (flat) classification to match USPS standards — items that exceed any (previously all) of letter dimension now qualify as flats.
* Fix - Legacy API credential validation no longer runs when switching to REST API, preventing headers-already-sent warnings.
* Fix - Validate empty Origin Postcode: show admin notice on save and skip API requests.
* Fix - FCPIS rates incorrectly filtered for valid custom boxes.
* Tweak - Hide product-level "Envelope" checkbox...

Read the rest of this update entry...