I received this reply earlier this year from Luxembourg. I had written to Princess Stephanie to wish her a Happy Birthday.
The envelope is the standard envelope from the Luxembourg Royals.
Inside is a flat card that is pretty identical to her past Birthday Replies with the same message.
The cards says:
Her Royal Highness, The Hereditary Grand-Duchess, greatly appreciates your kind wishes on her birthday and sincerely thanks you.
Luxembourg, February 2023
