# Collection Mission
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All Citizen users can participate in Collection Mission. You can receive additional DON as the mission reward at check-in after collecting all of the mission-target items on DOSI. Participating in a mission and being rewarded is done while being largely divided into four stages.
### **Item Collection**
You can collect mission-target items by purchasing them through 1st Sale or on Marketplace, or by evolving/leveling up your items.\
**Note:** The method for collecting an item may vary by type.
### **Mission Complete**
After you finish collecting the items, you'll be able to receive the mission reward. If you don't own the mission-target items after completing the mission, you will revert back to the collection phase, and you will no longer receive rewards for checking in.
### **Check-In**
To get mission rewards, you need to check in while the mission is complete.
### **Receive Mission Rewards**
You can receive daily mission rewards by checking in during the remainder of the mission period while the mission is complete.
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If you're curious about the ongoing Collection Mission, would you like to check it out?
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