Fix ads.txt issues in AdSense: If there’s an issue with ads.txt on your site, you’ll see an alert in your AdSense account. To prevent severe impact to your revenue, follow the relevant steps below to fix the issue.
Note: It may take a few days for your changes to be reflected in AdSense. If your site doesn’t make many ad requests it may take up to a month.
AdSense provides a personalized ads.txt file that you can download from your account. The personalized ads.txt file includes your publisher ID. Your publisher ID must be included and formatted correctly for your ads.txt file to be verified.
If there’s an alert on your homepage, click Fix now. Otherwise, click Sites.
Click the Down arrow to open the “Create an ads.txt file for…” message.
Click Download. Your ads.txt file is automatically downloaded.
(Optional) If you’re using another ad network, remember to add that network to your ads.txt file. Contact your ad network for their ads.txt information.
Upload your ads.txt file to the root directory of your site. The root directory of a site is the directory or folder following the top level domain (example.com/ads.txt).
To verify that you published your file correctly, check that you successfully see your file’s content when you access the ads.txt URL (https://example.com/ads.txt) in your web browser. If you can see the file in your web browser, it’s likely that AdSense will successfully find it.
Add your publisher ID to an ads.txt file
If your publisher ID is missing from your ads.txt file, you can copy it from your account and add it to your ads.txt file.