Amanuensis

a-man-u-en-sis (-mny-nss)n. pl. a-man-u-en-ses (-sz)

noun
1. A person whose employment is to write what another dictates, or to copy what another has written.
Although some might call it pastiche, she had to wonder whether she was a writer, an amanuensis or just a hack artist.

Synonyms: auditor, bookkeeper, cashier, clerk, copyist, counter jumper, counterperson, employee, notary, office helper, operator, paper pusher, paper shuffler, pen pusher, pencil pusher, receptionist, recorder, registrar, salesperson, secretary, seller, shopperson, stenographer, teller, transcriber, typist, white collar, worker.