Accusation and slander without anyone proof is what I read. I have seen the letter myself dated 2010 from the royal mail that states "the authority in Ireland has confirmed that your item was delivered and that the recipient didn't raise any concerns with them regarding missing contents. They also have no record of a complaint being received".
Unfortunately I cannot attached the full letter up as it will not let add the picture however if any wishes to see I am more than willing to prove this letter genuine. Maybe we should be questioning how genuine the statement above is as when read it all words with no proof to back up.