The principle of non-causa in bill refers to the validity of bill conduct is separated from the cause relation, so the cause relation have no influence on the bill conduct.

• 票据行为无因性原则的含义是指票据行为有无效力，与作为其发生前提的实质性的原因关系相分离，从而使票据行为的效力不再受原因关系的存废或者其效力有无的影响。