I wonder if they have a revocation list they circulate? Surely there must be a mechanism for informing those who need to know when it's a less famous member of

I wonder if they have a revocation list they circulate? Surely there must be a mechanism for informing those who need to know when it's a less famous member of royalty. "Colour Sergeant, there's some prince at the gate!" "Check the CRL (Crown Revocation List), just got a new one this morn."