I don´t wish to be picky but Princess and Sheikha are NOT precisely the same,much like Duke or Princess,They can be all royal titles but they shouldn´t be puzzled: but being an Emirati I believed I could respond to your dilemma about sending cards to Royals below inside the U.A.E. https://what-is-a-royal-membershi02346.jiliblog.com/89814385/how-what-is-a-royal-membership-card-can-save-you-time-stress-and-money