Hi,
Thank you for contacting the Mobile Ads SDK Support team.
The Error code 3, no fill error means that the ad request was successful, but no ad was returned due to lack of ad inventory. You may check this AdMob Error Codes & Logs for more information on different kinds of errors.
Could you kindly provide the below information for further investigation:
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Mobile Ads SDK Team |
[2025-04-23 20:40:10Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qUifQ:ref" (ADR-00301200)
Dear jj peng,
To help resolve the issue you've been experiencing with your account, I'm adding another support team – Product Support Team – with expertise in API troubleshooting. You'll receive an email shortly with all the teams involved.
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Mobile Ads SDK Team |
[2025-04-24 08:19:38Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qUifQ:ref" (ADR-00301200)
Hi,
Thank you for providing the requested information.
I have executed our Android sample project and Flutter sample project with the provided IDs and am unable to load the ads on my end. However, the execution has resulted in the display of an error message “no fill”. The Error code 3, no fill error means that the ad request was successful, but no ad was returned due to lack of ad inventory. You may check this AdMob Error Codes & Logs for more information on different kinds of errors.
The best way to get more information about your issue is the AdMob Help Center. You can also utilize the AdMob Communities for additional support.
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Mobile Ads SDK Team |
[2025-04-24 14:15:54Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qUifQ:ref" (ADR-00301200)
Hi,
Re-run your app. If you correctly added your device as a test devices, you will see a Test Ad label centered at the top of banner, interstitial, and rewarded ads and it should be 100% test Ads only meaning this will not count as impressions. Mediated ads DO NOT render a Test Ad label. If you aren't sure whether a mediation ad network adapter supports test ads, it is safest to avoid clicking on ads from that network during development. You can check Ad.responseInfo on any of the ad formats to figure out which ad network served the current ad for testing.
Kindly double check that your mediation setup is correctly configured. Once you enable single source in AdInspector all the integrated mediation adapters should be visible not just AdMob. Troubleshoot your ad unit ID for more information.
As stated earlier to help resolve the issue “No fill” you've been experiencing with your account, we have already added another support team Product Support Team with expertise in No fill troubleshooting. You'll receive an email shortly with all the teams involved.
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Mobile Ads SDK Team |
[2025-04-25 07:42:53Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qUifQ:ref" (ADR-00301200)