how can I redeem oder country iTunes card as a developer

Hello,

This support article explains what that means:

If you can‘t redeem your App Store & iTunes Gift Card, Apple Music Gift Card, or content code - https://support.apple.com/HT201195#differentcountry --> Card or code is from a different country or region:

"If you see a message that says the code must be redeemed in another storefront, the card was probably purchased in another country or region. You can't redeem Apple Gift Cards or App Store & iTunes Gift Cards outside of the country or region of purchase. For example, if you bought an App Store & iTunes Gift Card in France, you can't redeem it in the App Store in the United States."