We would not have royals right here in UAE like in true monarchies typical. Also we aren't a kingdom but much more a federation. Now we have 6 ruling households in 7 Emirates. but being an Emirati I assumed I could answer your problem about sending cards to Royals here https://dubai-royal-membership-ca80123.blogoscience.com/39136178/the-single-best-strategy-to-use-for-dubai-royal-family-members