Affiliation
Belong To
noun, verbal noun, の adjective
Your place of belonging describes your affiliation. It’s where you belong to.
This is often used to describe a person’s affiliation or membership to a particular organization, team, or group.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
所属部署に病欠のための診断書を提出しておいた方がいいよ。
You should turn in doctor’s notes for sick days to your own department.