Nintendo Voucher Redemption Instructions:

Using a browser, visit ec.nintendo.com/redeem/#/
Select Sign in and enter your Nintendo Account e-mail address and password, and then select Sign in again.
- If you are already signed in, review the user name in the top-right corner to confirm you are signed in with the correct Nintendo Account
Enter your 16-digit download code and then select, Next
Re-enter your Nintendo Account password when prompted, then select Redeem to complete the process.
- A confirmation e-mail will also be sent to the e-mail address registered to your Nintendo Account once this process is completed.

Nintendo eShop 3 Month USA - Merchant