The Secret Bond was a document drawn up by Cardinal Beaton and signed at Linlithgow by a number of Scottish peers and lairds on 24 July 1543. They agreed to prevent the marriage of Mary, Queen of Scots, to Prince Edward of England. The document is sometimes called the "Linlithgow Bond". After an agreement was reached with the Governor of Scotland, Regent Arran, Mary moved from Linlithgow Palace to Stirling Castle.

David Beaton was Archbishop of St Andrews and the last Scottish cardinal prior to the Reformation.