How can I activate an invalid Apple Gift Card?

Please follow the steps in this Apple Support article. 

If you can't redeem your Apple Gift Card or App Store & iTunes Gift Card - Apple Support

If after reviewing the article, and following the directions in the article, you need additional assistance please follow the link below to contact official Apple Support. 

Contact Apple Gift Card Support

If you receive a request for payment using Apple Cash, or If you believe you are the victim of a scam, please contact Apple Support and report it to local law enforcement.

About Gift Card Scams - Apple Support

You may also report the scam to the FTC Complaint Assistant and to the FBI’s Internet Crime Complaint Center

If you receive a request for payment using Apple Cash, or If you believe you are the victim of a scam, please contact Apple Support and report it to local law enforcement.

• Where did you purchase the Gift Card?
• Do you have the physical card and using the Camera to read the numbers?
• In most cases you will see the Invalid Code when a character has been entered incorrectly. The most common ones are seen here and if using the Cameral to read the code, it can also read them incorrectly.

If you can't redeem your Apple Gift Card, App Store Card, or App Store & iTunes Gift Card - Apple Support

Micheal536 wrote:

I bought the card at the post office and also I have the card physical with me

Follow the information that has been provided. All of your options are there including the link for common problems redeeming the Gift Cards and the link to contact Apple directly if not resolved.

I bought the card at the post office and also I have the card physical with me