term:

Misnomer

misnomer n

[Anglo-French mesnomer, from mesnomer to misname, from Middle French mes- wrongly + nommer to name, from Latin nominare, from nomin- nomen name]
: the misnaming of a person in a legal document or proceeding (as in a complaint or indictment)
;specif
: the institution of proceedings against and service of process on the correct party using the incorrect name compare idem sonans NOTE: Amendment of the pleadings is generally allowed in cases of misnomer.