How to activate a Warframe Duviri Paradox key?

Redeeming a Warframe Duviri Paradox key is really simple, just follow these steps: 

TO REDEEM YOUR CODE ONLINE:

1. Go to Warframe.com/promocode
2. Log in to your account (upper right)
3. Enter the Promo Code in the code field
4. Check in-game for your items

TO REDEEM YOUR CODE IN-GAME

1. Log in to Warframe
2. Press escape to open the Game Menu
3. Click on Market
4. Click on Redeem Code (lower right)
5. Enter the Promo Code in the code field
6. Check your Inventory for your items

The key is not working

If you have activated the key according to the guide but the code appears not to work, please check what type of error message you receive and depending on it follow the appropriate instructions:

• My key is Duplicated / Already used
• My key is Invalid
• My key is region locked / can't be activated in my country
• My key activated a different product