Response from Sarah, Duchess of York on the occasion of her 62nd Birthday.
Born Sarah Margaret on 15th October 1949 at London Welbeck Hospital in London to Major Ronald and Susan Ferguson.
The reply is in the form a card with a printed message thanking me for my wishes to Sarah.
Card
RoyalResponses 
Hello, which is the correct style to address her?
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Sarah, Duchess of York
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Thanks.
And writing to her…
Your?
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Dear Sarah, Duchess of York
She doesn’t hold a style or title
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