ID Medal is key item in Resident Evil 6. It can be found in Jake's campaign up to 16 pieces.
3 medalions are needed to proceed to the blocked west area of the facility. 10 medals are needed to gain access toeast area. And all 16 medals are needed for obtaining the weapon Bear Commander.
There are can be found 16 medals during the completion Chapter 3-2 of Jake's campaign. 8 of them has can be found in direct places of the level and 8 others are can be dropped by J'avos and Strelatses in this area.