Blue_Medallion are collectible items found in Resident Evil 4.
The Blue Medallions are part of optional task within the main campaign of Resident Evil 4. You first get this assignment by seeing the note pinned up on a tree in the farm, right below a blue medallion. When you reach the Merchant, he asks you if you have seen the Blue Medallions and that if you shoot at least ten, he'll give you a specialized handgun. If you shoot all fifteen, he will give the gun with a free upgrade in firepower.
Once you pick up the note, the locations will be marked on your map. There are seven In the Farm and 8 in the Cemetery.