The BBC has failed multiple times to serve Donald Trump’s family members with legal orders in the US President’s defamation case against the broadcaster.
The national broadcaster has been attempting to subpoena Mr Trump’s son, Donald Trump Jr; his daughter, Ivanka Trump; and son-in-law, Jared Kushner, to require them to give evidence, however, multiple efforts have failed so far.



It’s impossible to prove a negative. Even as recently as a month ago, I sent a birthday card to a friend in Germany and she said she hasn’t gotten it yet.
I’ve mailed her letters and cards before and she usually gets them in a week.
I know she isn’t lying.
Imagine if this was a legal notice.
I do understand what your saying but the possibility exists that a legal notice mailed to someone can be lost or misdelivered. The US has process servers where you can hire someone to serve legal papers to someone. In this case, the person notes the time and date of service.
In the absolute worst cases, some courts allow service to occur in a newspaper. This often happens in divorces when one party cannot be located due to abandoning them.
Most of the time in the US, service to their legal residence via certified mail that offers proof of delivery is usually enough for most cases.