Princess Eugenie sure aced her royal etiquette test — and ours too.
Princess Eugenie Shows Off Sapphire Engagement Ring (with Major Kate Vibes!) in New Portraits
Credit: Jonathan Brady/PA Images/Getty

As mama and papa always taught us, writing a handwritten thank you note—whether after a job interview or special dinner party—is worth one hundred times its weight in stamps.

Clearly, Princess Eugenie of York and her fiancé Jack Brooksbank agree with this Southern wisdom. Recently, the couple took the time to mail notes to people who expressed their excitement over their engagement. As Brides initially reported, other royals have offered similar gestures, with Prince William and Kate Middleton mailing a letter (albeit, typed) and photo on the occasion of their sixth wedding anniversary to royal fans last year.

WATCH: Prince Harry and Meghan Markle: All About the Royal Ring

Last week, the Royal Letters instagram account shared Princess Eugenie's thoughtful mailer, which included a photo of the couple and a card and envelope embossed with an "E." The missive read, "We are so grateful for your lovely message congratulating us on our engagement. We are so happy and excited and look forward to 2018 being a very special year for us. Thank you for thinking of us," with their names signed below.

It may not seem like much, but taking the few seconds to sign these cards surely brightened the days of everyone who received them.

Now, where can we pick up some of that spectacular stationery?