# app-ads.txt
As an extension of its [Authorized Digital Sellers (`ads.txt`)](https://iabtechlab.com/wp-content/uploads/2022/04/Ads.txt-1.1.pdf) specification, the Interactive Advertising Bureau (IAB) provides the [Authorized Sellers for Apps (`app-ads.txt`)](https://iabtechlab.com/wp-content/uploads/2019/03/app-ads.txt-v1.0-final-.pdf) specification that defines how app publishers should list their authorized monetization partners. Using this file, buyers can confidently identify authorized sellers and prevent app domain spoofing and unauthorized selling of in-app inventory.
To implement `app-ads.txt` for fraud prevention, complete the following tasks:
* Add DT to your `app-ads.txt` file. This authorizes DT as a direct seller. For more information, see [Adding DT to Your app-ads.txt File](#adddt).
* Add the `app-ads.txt` file to the root of your developer or marketing website. For more information, see [Place Your app-ads.txt File](#txtlocation).
* Add your website URL to your app store listing. Buyers only search the listed sites for `app-ads.txt` files. For more information, see [Adding a Developer Website](#addurl).
## Adding DT to Your app-ads.txt File
To list DT in your app-ads.txt file:
1. Create your `app-ads.txt` file according to the IAB specification for [`ads.txt`](https://iabtechlab.com/wp-content/uploads/2022/04/Ads.txt-1.1.pdf).
2. Add DT as a direct seller in your `app-ads.txt` file by copying the following record into your `app-ads.txt` file and entering your DT Publisher ID where indicated.\
For more information, see [Locating Your DT Publisher ID](#dtid).
```
fyber.com,YOUR_DT_PUBLISHER_ID,DIRECT,1ad675c9de6b5176
```
3. Add official DT resellers in your `app-ads.txt` file. For a complete list of official resellers, see [app-ads.txt Contents](#section-listing-indirect-authorized-sellers).
### Locating Your DT Publisher ID
To locate your DT Publisher ID:
1. Log in to the [DT Console ](https://console.fyber.com/login)and click your user name at the top-left of the screen.
2. Select **User Profile**.
3. From the **Basic Reporting API - Credentials** section, copy your **Publisher ID**.
### app-ads.txt Contents
The `app-ads.txt` file contains entries for DT and our official resellers.
Copy the contents into your `app-ads.txt` file and enter your DT Publisher ID where indicated.
{% hint style="danger" %}
Beware of unknown companies reaching out directly and requesting to be added to your `app-ads.txt` file. This may be fraud. DT strongly advises that you only list your direct partners and their official resellers.
If you suspect a company is fraudulently contacting you, contact your DT Representative.
{% endhint %}
## Place Your app-ads.txt File
When placing your `app-ads.txt` file on your domain, ensure that the location meets the following criteria:
* Either the root of your domain (`fungames.com/app-ads.txt`) or no more than one subdomain below the root (`my.fungames.com/app-ads.txt`).
* If you place the file in a subdomain, do not place it in either the `www.` or `m.` subdomains.
## Adding a Developer Website
List your developer website URL in all app stores where you offer your app so that advertising platforms can locate your `app-ads.txt` file. The following sections provide guidance in entering a website URL for your app listing.
### Apple App Store
The App Store provides your Developer URL as part of the app listing.
To update or add a developer website to your App Store listing:
1. Log in to [App Store Connect](https://appstoreconnect.apple.com/login) and locate your app and version.
2. In the **Marketing URL** field, enter the URL for the domain where you placed your `app-ads.txt` file.
### Google Play
The Google Play Store lists your developer URL in the **App Support** section of your app store listing.
To specify your developer website for Google Play:
1. Log in to the [Google Play Console](https://play.google.com/console) and go to **Store presence→Store settings**.
2. Click **Edit** and enter the URL for the domain where you placed your `app-ads.txt` file.
