a 'nom de plume' is apseudonym for writers. There is no registration.

My favorite author uses a nom de plume.

name of pen, which also states that John McGinley is awesome.

Charles Dodgson is best known today by his nom de plume, Lewis Carroll.

Nom de Plume, a fellow author, accused Stephen King of stealing the idea for his novel "Misery" from one of Nom de Plume's own works. The accusation was vehemently denied by King and the matter was eventually settled out of court.