The Order of Prohibited Legitimacy is a Parmese dynastic order of knighthood originally awarded by the House of Bourbon-Parma to Carlist supporters. The order was founded in 1923 by Jaime de Borbón y de Borbón-Parma, a Carlist claimant to the Spanish throne and a Legitimist claimant to the French throne, for rewarding loyalists of the Carlist movement. In modern times, there are two branches of the Order. One branch's Grand Master is Prince Carlos, Duke of Parma while the other's is his uncle, Prince Sixtus Henry.

The House of Bourbon-Parma is a cadet branch of the Spanish royal family, whose members once ruled as King of Etruria and as Duke of Parma and Piacenza, Guastalla, and Lucca. The House descended from the French Capetian dynasty in male line. Its name of Bourbon-Parma comes from the main name (Bourbon) and the other (Parma) from the title of Duke of Parma. The title was held by the Spanish Bourbons, as the founder Philip, Duke of Parma was the great-grandson of Ranuccio II Farnese, Duke of Parma. The House of Bourbon-Parma is today the Sovereign House of the Grand Duchy of Luxembourg (agnatically) and all members of the Grand Ducal Family of Luxembourg are members of the House of Bourbon-Parma with the title of "Princes/Princesses" and the predicate of Royal Highness.