if u have tracking number it will be good and can the search scope can be reduce. if u only provide name and address those ppl at custom section would have a problem because need to look for every record. can't be done fast so the better way ask sender to send it using ems or registered parcel.

u may try go to the custom office (unit bungkusan pos) and ask them for the record book. so u can have to check it manually. if there's no tracking number (cheapest) it will be under Letter Packet record book/file.