Unfortunately it is the norm but its not how transfers are supposed to work hence liverpool getting fined for various instances of tapping up - rule below.
"The Premier League states the official definition is: "Subject to Rule T.7, a contracted player, either by himself or by any person on his behalf, shall not either directly or indirectly make any such approach as is referred to in Rule T.5 without having obtained the prior written consent of his club."
If we get pissed off with liverpool we should report them again.