i was on holiday and gave mine and my mums card to my mate and his brother, for the spurs game, need to message the club,(i used the feedback form in the members area on club website) gave them names and addresses of people using the tickets go email back saying that was fine.Its pretty much covered under 3.3 of ticket conditions https://www.liverpoolfc.com/tickets/ticket-terms.I suppose if they club are really concerned they could ask for information that the person you give it to is "known to you personally" I say its fine if its a friend you trust.
where is the feedback form may I ask? can't seem to find it