As of October 27, 2025, TikTok uniformly requires that USPS labels must be generated from the backend platform. However, labels for other channels can be generated by third parties. For low-value, price-sensitive goods, it is recommended to use domestic emerging logistics providers like UNIUNI, GOFO, Swiftx, etc., as their prices are very competitive. The only shortcoming is that zip code coverage is not yet complete across the US, but they are continuously improving their coverage.