About a bad gift card

Do you mean to whom it was redeemed? I have not read of a way for a user to do that, nor of Apple performing that service. You can ask Apple but I very much doubt they will tell you even if they know. That would be a violation of privacy.

This support page has information about contacting Apple support and service ➔ https://support.apple.com/106932 If live support options (chat and/or telephone) are available they will show near the bottom left.

- Telephone numbers may only work when calling from the same country.

- Chat options (telephone numbers appear as active links, not plain text) may depend upon cellular connectivity. If a number shows as an active link, click on it to see additional options.

- If chat is not available on the top level support page, try selecting your hardware and narrow down your issue to see if a support article offers a support link offering chat. For example, the contact support link on this page https://support.apple.com/119902#zerobalance offers a chat link about emptying account balance even on a computer where the top level page does not offer any chat.

With an iPhone, iPad, or Vision, you may be able to chat using the Apple Support App if it is available in your country —> https://apps.apple.com/app/apple-support/id1130498044

Hello~ See the link below…

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

Contact Apple Support - Apple Support

You will need to contact Apple. Many scams abound and due to this I purchase my Apple Gift Cards here…

Apple Gift Card - Apple

Likely you were inadvertently part of a scam. Apple will not provide any details but can provide you with assistance.

~Katana-San~

"About a bad gift card: Can you help me check where this card was used"

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No. But, perhaps the seller can.

Beamersmile wrote:

Can you help me check where this card was used

Nope, there is no Apple here in these user to user technical forum, nor can we check were your card was used.