It seems incredibly unlikely that formal notice would not include and address, but stranger things have happened.
"Not so long ago I saw a very odd post on Twitter about the currently down, terrorism, paedophilia and stalking site Kiwifarms. An image had been shared in a Kiwi Farms Telegram chatroom, and then re-posted to Twitter where I saw it. It was a purportedly a letter from West Yorkshire Police to a suspect inviting them to a PACE interview (a police interview under caution) about posts on Kiwi Farms. The letter appeared real. The difficulty is, how could a police force obtain the IP address of a poster? After some thought, I realised that all but one of the mechanisms I could think of involved hacking or at least joining Kiwi Farms. Under recent laws, British police can hack websites – which got me thinking about the timing of the recent hack in which the site’s data was deleted."
That said, Sam is notorious for claiming that he's heard/seen information when, in fact, he created it from whole cloth.