The celebrant(s) live(s) overseas. Can I still apply for a message?
(Excluding Australia, Canada and New Zealand) Her Majesty only sends messages to people who are current citizens of Her Realms and UK Overseas Territories. It would therefore be necessary for you to supply the Anniversaries Office with proof of the celebrant(s) British Nationality (i.e A photocopy of a current or recent British Passport).