noun
written application; application form
Refers to a physical or digital document submitted to request something, such as a permit, membership, or service.
パスポートの申請書に必要事項を記入した。
I filled in the required information on the passport application form.
申請書は窓口で受け取れます。
You can get the application form at the counter.
Compound of 申請 (shinsei, 'application, request') and 書 (sho, 'document, writing').