# Dual End Card

A Dual End Card is a personalized extension of the ad campaign that gives users a final opportunity to engage with it. The DT Exchange generates it from the bundle information from the open RTB bid, which includes the app name and icon.

DSPs can implement this feature and set the `dualendcard` attribute in the `BidResponse.seatbid.bid.ext`, which sends it for eligible traffic.

### BidRequest.imp.video.ext

| ATTRIBUTE     | DESCRIPTION                                                                                                                                             | TYPE    |
| ------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------- | ------- |
| `dualendcard` | <p>Indicates whether the inventory is eligible for a Dual End Card.<br>(<code>1</code> = true, <code>0</code> = false; default: <code>1</code>)<br></p> | Integer |

### BidResponse.seatbid.bid.ext

| ATTRIBUTE     | DESCRIPTION                                                                                                                                | TYPE    |
| ------------- | ------------------------------------------------------------------------------------------------------------------------------------------ | ------- |
| `dualendcard` | <p>Indicates whether DTX renders the Dual End Card.</p><p>(<code>1</code> = true, <code>0</code> = false; default: <code>1</code>)<br></p> | Integer |

### FAQ

<details>

<summary>How will DT Exchange know which store product to show?</summary>

To enable a Dual End Card, DSPs must provide the store listing ID of the app under the `BidResponse.seatbid.bid.bundle`.

</details>

<details>

<summary>In which cases will the Dual End Card be displayed?</summary>

DT Exchange displays the Dual End Card when the user does not click on an ad video or completion.

</details>

<details>

<summary>How are click tracking and destination handled?</summary>

DT Exchange uses `CompanionClickThrough` and `CompanionClickTracking` from the displayed creative end card to track clicks and destinations.

</details>