from
Bouvier's Law Dictionary, Revised 6th Ed (1856)
RIENS PASSA PAR LE FAIT. The name of a plea; it signifies that nothing
passed by the deed; for example, when a deed is acknowledged in court, a man
cannot plead non est factum, because the act was done in court, which cannot
be denied; but when the deed has been acknowledged in a court not having
jurisdiction, the party may avoid the effect or operation of the deed by
pleading riens passa par le fait, for this plea does not impeach the court
where it was acknowledged. Bac. Ab. Evidence F; 1 Gilb. ET. by Lofft, 326.