When office works got more complicated, Yuhitsu started to prepare Monjo regarding matters decided through formal procedures and signed them with a part of their authority, providing the Monjo the same effect as the documents issued by their lords.
なお、事務が煩雑化すると、右筆が正式な手続を経て決定された事項について自らの職権の一環として文書を作成・署名を行い、これに主君発給文書と同一の効力を持たせる例も登場する。