Customs delays rarely come out of nowhere. They come from the same handful of mistakes, made by different teams, on different shipments, over and over. Here's what's actually causing your freight to sit. Incorrect or incomplete commercial invoices are probably the single biggest culprit. A missing country of origin, a unit of measure that doesn't match the packing list, a description that says "parts" when the HS code says something more specific — any one of those can stop