write down as
write (someone or something) down as (something)
To create a piece of writing about someone or something that classifies, categorizes, or signifies them as a particular kind of person or thing. I'll write you down as a "maybe" for right now. Just give me a more definitive yes or no when we get closer to the date of the party. The seller wrote this item down as brand new, but it has clearly been used before. The author wrote this story down as a warning to future generations.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
write someone down as something
to list someone's name, noting something. I'll write you down as a contributor. Can I write you down as a charter member?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.