How to redeem old iTunes gift cards?

The article "What type of gift card do I have?" explains the different kinds of gift cards Apple uses and has links on how to redeem them and what can be purchased with each kind. Click on the link --> What type of gift card do I have? - Apple Support

Read this support article to learn how to redeem your Apple Gift Card or App Store & iTunes gift card --> How to redeem your Apple Gift Card or App Store & iTunes gift card - Apple Support

"Gift card: I have some old iTunes gift cards , how do I redeem them"

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For reference...

Avoiding Gift Card Scams:

A. Contact the Seller.

Whomever the seller is, ask them for a refund.

B. Where was the Purchased?

• Online?:

If this was purchased online (i.e. eBay) then contact the site, seeing if the seller can be accountable and if you can get your money back.

• In-Person?:

If this as purchased in person, then there may be nothing you can do but contact them, asking for your monkey back.

Or...

• A Retailer?:

If purchased at a retailer, take it back, asking what your options are for return. Gift Card return policies vary by rules of law. So, take to the Manager, asking if you can get a new card.

C. Avoiding Scams:

In all recommend getting it at a retailer - that way you can easily avoid scams. Getting it online might result in scams (and plenty are reported).

Go Here: Recognize and Avoid Phishing Messages, Phony Support Calls, and Other Scams - Apple Support