If its a certified letter Re: seized order, don't pick it up. At least I wouldn't and most others who order intl. would tell you the same. Why give the MIB the satisfaction of knowing you got their letter. They may try sending again though (the post office), but usually give up on the 2nd or 3rd attempt, and its return to sender ( always think of the old Elvis song,whenever I say "return to sender"). I think also, if its certified, you can't just sign the back of the card and let them leave the package, I think thats registered.You have or someone has to physically be present or go to the PO to pick it up. I may be wrong though, and If I am, someone please correct me! Just ignore the letter, you have nothing to worry about. Take care!