Achievement rewards can be redeemed from the Achievements menu under Character of the main menu.

Find an unclaimed reward in the Achievements menu and select it to redeem.

Conveniently, there are filter options at the top. Use them to display only the achievements with certain types of rewards.

* This action cannot be performed while undertaking a duty.

The procurement of Achievement Certificates and their exchange will be carried out by speaking with Jonathas in Old Gridania (X:10.6 Y:6.3).