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But if you instead get an error message saying that Apple is "unable to check coverage for this serial number," they're almost definitely fakes. If you're brought to either a page that asks you to enter the purchase date, or one that tells you what warranty options you have available, your AirPods are probably legit. Once you have the AirPods' serial number, head to the Check Coverage website and enter it into the field at the top, then fill out the CAPTCHA and click Continue.
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The case's serial number is what matters here. Note: Depending on the model, each AirPod earbud might have its own serial number too, but this website won't recognize them even if they're real.
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The serial number is written into the space that holds your left earbud.
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