I received this reply back in 2021 from The Cambridges (who are now known as The Wales.) I had written to the family at the end of 2020 to wish them a Merry Christmas.
The envelope is the usual, that Prince William & Princess Kate still use today. The only difference is the postmark is still the one from Queen Elizabeth II's reign.
The back of the card is the usual. It features the coronet of a child of the heir apparent above the name of their office, Kensington Palace. The message is similar to past years, although they change it up slightly each year.
The card says:
The Duke and Duchess of Cambridge, Prince George, Princess Charlotte and Prince Louis thank you for your very kind message at Christmas.
This was most thoughtful of you and greatly appreciated by Their Royal Highnesses who send you their best wishes for a Happy New Year.
More Replies from the Cambridges