They should have asked first - the Royals

Looks like Meghan and Harry are going to have to have their stationary reprinted. Re-branding is expensive.
From the London Daily Mail:

Queen BANS Prince Harry and Meghan Markle from using lucrative 'Sussex Royal' brand that they hoped to use to build new lives because 'they simply cannot sell themselves as Royals’

• • The Duke and Duchess of Sussex spent tens of thousands of pounds on a new Sussex Royal website and their hugely popular Instagram feed
  • Couple sought to register Sussex Royal as global trademark for a range of items and activities, including clothing, stationery, books and social-care services
  • Also looked to set up a new charitable organisation – Sussex Royal, The Foundation of the Duke and Duchess of Sussex
  • But the Queen and senior officials are believed to have agreed it is no longer tenable for Harry and Meghan to keep the word 'royal' in their 'branding'

The Duke and Duchess of Sussex must drop their 'Sussex Royal' label after deciding to step down as working royals.

Following lengthy and complex talks, the Queen and senior officials are believed to have agreed it is no longer tenable for the couple to keep the word 'royal' in their 'branding'.

Harry and Meghan have spent tens of thousands of pounds on a new Sussex Royal website to complement their hugely popular Instagram feed.

They have also sought to register Sussex Royal as a global trademark for a range of items and activities, including clothing, stationery, books and teaching materials.

In addition, they have taken steps to set up a new charitable organisation: Sussex Royal, The Foundation of the Duke and Duchess of Sussex.

It has now been made clear that they will need to 're-brand'.

Didn't they have anyone advising them? I bet they did and I bet they ignored that poor sod because it wasn't the "no problem" they were looking for. Their fifteen minutes are rapidly ticking away. Meghan who?