International packages will be often (or maybe even always) checked at customs. At my last job we’d have issues like that because we dealt in international foods. Once and a while we’d be waiting on a container of product from like Jamaica or Ecuador or something, and it would just be sitting at Port of Miami waiting for customs inspection. I don’t recall it ever taking a super long time though, it just would seem long because we needed the product and customers were bitching at us, haha.
