Many AdSense publishers suddenly see a warning in their dashboard:
“Earnings at risk – You need to fix some ads.txt file issues.”
This message appears when Google cannot verify that your website authorizes Google to sell ads on your behalf.
The ads.txt (Authorized Digital Sellers) file is a small text file placed in the root of your website. It tells ad networks which companies are allowed to sell ads for your site.
Example ads.txt entry for AdSense:
google.com, pub-XXXXXXXXXXXXXXXX, DIRECT, f08c47fec0942fa0
1. ads.txt file not uploaded
Many publishers forget to upload the file to the root directory.
Correct location:
https://yourdomain.com/ads.txt
2. Publisher ID mismatch
If the publisher ID in the file does not match your AdSense account, Google will show the warning.
3. File placed in wrong folder
Some people upload ads.txt inside:
/public_html/blog/ads.txt
But it must be in:
/public_html/ads.txt
4. DNS or CDN caching issue
If you use Cloudflare or another CDN, Google may not detect the file immediately.
5. Subdomain confusion
Many users think they need ads.txt on every subdomain. Normally the main domain file is enough.
Step 1
Login to your hosting or cPanel.
Step 2
Create a file named:
ads.txt
Step 3
Add your AdSense line:
google.com, pub-xxxxxxxxxxxxxxxx, DIRECT, f08c97fyc0942fa0
Step 4
Upload it to the root directory.
Step 5
Check in browser:
https://yourdomain.com/ads.txt
Step 6
Wait 24–48 hours for AdSense to verify.
Never add random ad networks in ads.txt unless you are actually using them.
The ads.txt warning does not stop ads immediately, but if ignored, it may reduce advertiser demand and your earnings.
Fixing the file quickly helps maintain your AdSense revenue.
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