When you enter a valid coupon code and click the confirm button on the coupon redemption page, the crystals are immediately credited to your account.
After entering the coupon code, if you return to the CookieRun game, the crystals should already be added, and the total number of crystals will reflect the rewards.
If you see a message saying "You can check your coupon rewards after returning to the game," this confirms that the crystals were successfully credited to your account.
Here are a few things to check if you encounter issues:
Incorrect Code: If you see a message stating that the "Please check the coupon code!", it means the code you entered is not correct. Even a single typo will prevent the crystals from being credited, so double-check the coupon code and try again.
Expired Code: If the code has expired, also message saying the "Please check the coupon code!" will appear. Please verify the coupon code’s validity period before entering it.