The international standard for identifying postal items
The Universal Postal Union's S10 standard, in all its glory Have you ever received a parcel from overseas? I did recently, from Switzerland! Looking at the envelope, I realised the format of the tracking number ( UT038926726CH ) was in a very similar (if not identical) format to ones I'd used frequently here in the UK. I'd been receiving emails from Royal Mail about the parcel, so I just presumed that there was some data-sharing agreement in place with Swiss Post and Royal Mail had just given