The first 100-year-old birthday cards, which have been signed by King Charles III, at Buckingham Palace, London. Picture date: Sunday October 23, 2022. PA Photo. See PA story ROYAL King. Photo credit should read: Aaron Chown/PA Wire

Cards from Their Majesties The King and The Queen containing a congratulatory message can be sent to individuals celebrating their 100th and 105th birthday and every year thereafter.

This card is contained in a special envelope, which is delivered through the normal postal channels.

The delivery of these congratulatory messages is arranged by the Anniversaries Office within the Private Secretary’s Office in the Royal Household located at Buckingham Palace.

In order to request a congratulatory message from The King and The Queen, friends or family must complete download and complete an application form (click here). Please return it to the Anniversaries Office, Buckingham Palace, London SW1A 1AA no sooner than three weeks before the celebration date. It is possible to receive a belated message up to six months after the event. The Anniversaries Office will write to confirm that the application has been received and approved. Please note that you do need to provide the Anniversaries Office with documentary proof of the occasion – a photocopy of the celebrant’s birth certificate, which will be returned to you in due course. You will receive prompt acknowledgement of your application confirming that a message will be sent and returning all documents to you.

If necessary, you can obtain a certified copy of the birth certificate from:

The General Register Office (Anniversary Section)
The Office for National Statistics
Smedley Hydro
Trafalgar Road
Merseyside PR8 2HH
Telephone 0845 603 7788