How to redeem Apple Gift Card with codes missing?

Click here and ask Apple Support for assistance; supply them with the remaining part of the code.

The people on these boards are mostly other customers and won't know what the missing characters are.

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Also pay attention to the red letters on the card stating "Do not share your code". This is a public support site and someone may be better at guessing those codes than you are and you would have a Gift Card that no longer has any money on it.

Using the link provided by Niel will get you in touch with Apple directly where they will have you securely send the card info to them.