nemo dat qui non habet - he who does not have does not give.
novàtio - novation, repayment of one obligation by another.
nuda pàctio obligatiònem non pàrit - a promise alone does not create a legal obligation.
nùllum inìquum est praesumèndum in jùre - in law there is no presumption for injustice.
nùnquam fìctio sine lège - there is no fiction without law [more precisely: without law].