Right. The normal way this works is that when you buy something to be imported into the US, you compute the tariffs and post a "customs bond" with CBP at the sa

Right. The normal way this works is that when you buy something to be imported into the US, you compute the tariffs and post a "customs bond" with CBP at the same time you pay for the product. When the shipment arrives in the US, the customs bond is used to pay the tariff, and the shipment is released by CBP. Shipping companies such as DHL integrate this into their systems so the end user doesn't have to deal with it directly. To the purchaser, it looks like tariffs are paid when the product is ordered. That's the happy path, taken by most imports. But when tariffs change faster than it takes to get the shipment from source to destination, the bond won't be for the right amount. You then enter the wonderful world of "insufficient bonds". Here's "Understanding Insufficient Customs Bonds in Nine Easy Steps", which outlines the process and tries to sell you on a service that deals with the problem.[1] Coming May 2: the end of "de miniumus" customs exemptions for small packages under $800 value. Goodbye, Shein, Ali Express, and dropshippers. Unless, of course, the rules are changed again. [1] https://www.afcinternationalllc.com/customs-brokerage-news/understanding-insufficient-customs-bonds-9-easy-steps/ https://www.afcinternationalllc.com/customs-brokerage-news/u...