#upu — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #upu, aggregated by home.social.
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I did not know this, but it makes sense: When you send a parcel, put name and address of both sender and addressee both outside and *inside* the parcel. So say the Universal Postal Union regulations:
"The office of posting shall also advise the sender to put in the parcel a copy of his address and that of the addressee."