An IAB Tech Lab standard that lets app publishers declare which ad networks are authorized to sell their inventory.

Where do I put the app-ads.txt file?

At the root of the developer website listed in your App Store / Google Play page, e.g. https://studio.com/app-ads.txt.

What is a Certification Authority ID?

An optional TAG-ID of the ad system, the 4th field of an app-ads.txt record.

westernunion.com app-ads.txt check

westernunion.com is missing out on higher CPMs: its app-ads.txt has 1 invalid line. Buyers' crawlers skip invalid lines, so those sellers can't be verified.

Checked 20 Oct 2026. 35 lines, 34 unique records, 0 duplicates, 1 invalid lines, 8 ad networks detected.

Ad networks in westernunion.com/app-ads.txt

Google AdMob — accounts pub-7168411132481795, pub-6549202523982411: 2 lines in the file
PubMatic — accounts 163601, 163684: 2 lines in the file
Index Exchange — accounts 206596, 207139: 2 lines in the file
OpenX — accounts 560537663, 560544766: 2 lines in the file
Smaato — accounts 1100057465, 1100058156: 2 lines in the file
Magnite (Rubicon) — accounts 27186, 27188: 2 lines in the file
Yango Ads — partner (reseller) lines only: 10 lines in the file, 400 expected lines missing
Bidmachine — partner (reseller) lines only: 10 lines in the file, 400 expected lines missing

Invalid lines

conversantmedia.com, 100645, DIRECT/RESELLER, 03113cd04947736d

Corrected file: westernunion.com app-ads.txt (fixed).

FAQ

Does westernunion.com have an app-ads.txt?

Yes — https://westernunion.com/app-ads.txt has 35 lines (checked 20 Oct 2026).

Which ad networks does westernunion.com work with?

Its app-ads.txt lists Google AdMob, PubMatic, Index Exchange, OpenX, Smaato, Magnite (Rubicon), Yango Ads, Bidmachine.

Is the app-ads.txt of westernunion.com correct?