The use of the title HRH on a card the duchess sent to a friend has set off British tabloids, but the royal couple say the haven't broken any agreements

When Prince Harry and Meghan stepped back as working royals, one of the conditions on which they forged their independent lives was that they would retain their HRH titles but not use them. Standing for His or Her Royal Highness, the styling is held by senior royals in lieu of their position within the monarchy.