The Duke of Sussex's change in primary residence was confirmed by documents filed to the UK, in a filing for sustainable tourism charity Travalyst, which was founded by Prince Harry. This also recorded the Duke under his full name, Prince Henry Charles Albert David Duke of Sussex.
As founder and active patron of the charity, Prince Harry is obligated to inform Companies House of any major changes to his personal circumstance.
Travalyst is a non-profit group which aims to "credible, consistent sustainability information" with travel, and technology groups, including Visa, and Booking.com.
Prince Harry and his wife Meghan Markle quit their roles as senior working royals in March 2020, and have lived in California ever since.
Harry had previously explained his reasons for quitting the royal family, citing "toxic" stories about him in the British press.
He also made several claims against the royals in an explosive tell all book, Spare, published last year, where he wrote about fallouts with the family, including his brother Prince William.