send out; submitThis is the object marker を followed by the stem of 出す, meaning “send out,” “submit,” “put out,” or sometimes “bring out,” depending on the object. It commonly appears before に to express going somewhere to do the action, as in 履修届けを出しに行く (go to submit a course registration form).
JA: 申込書を出しに郵便局へ行きました。
EN: I went to the post office to submit the application form.