The news came to light through a letter sent on behalf of the couple to a bike shop.
Following the online emergence of the letter, the Duke and Duchess of Sussex faced ridicule from their critics.
The letter was discovered as Prince Harry returned to the United States after providing testimony in a phone hacking case at the London High Court.
The correspondence, dated June 6, expressed gratitude on behalf of Prince Harry and Meghan Markle from the "Office of Prince Harry and Meghan Markle."
Interestingly, the letter was printed on an A4 paper without any royal emblems or stationary, further emphasizing the couple's departure from their former royal roles.
The letter specifically acknowledged a thoughtful gift sent to their son, Archie, on his fourth birthday. It read, "On behalf of Prince Harry and Meghan, The Duke and Duchess of Sussex, please accept their sincere thanks for the thoughtful gift you sent to Prince Archie for his fourth birthday. The bike has brought much joy and is greatly appreciated by the family."
The bike shop, upon receiving the letter, took to their social media page to share the heartfelt expression of gratitude, stating, "We hope they don't mind us sharing this lovely thank-you letter we received today!"
This revelation has shed light on the couple's activities in California and marks the first confirmation of their official office in the state. As Prince Harry and Meghan continue their post-royal journey, the public remains intrigued by their endeavors and the scrutiny that often accompanies their every move.

