The present invention provides a shipping method for guaranteeing that an article for shipping has remained sealed with a seal and has remained unopened. Specifically, first, the sender is asked to enter a signature 5 on a seal 6, Because of the pressure from a writing implement at time of entering, the signature 5 is copied to a sheet for verification 7. An article for shipping 2 is sealed with a seal 6 and transported to a recipient. The signature 5 on the seal 6 is verified against the signature 5 on the sheet for verification 7. By confirming that the two match, it is confirmed that the seal 6 has not been replaced. Thus it is guaranteed that the article for shipping 2 has remained sealed with the seal 6 and has remained unopened.