# Clients
Tracknow automatically creates a dedicated profile for each client who completes a conversion through an affiliate referral. When a `customer_id` is provided, this profile enables clear visibility into individual clients within the platform, including their full conversion history and the commissions they generate for associated affiliates.
***
### Clients Screen
Navigate to **Performance** → **Clients**
On this screen you can:
* View the list of clients that completed conversion after being referred by an affiliate
* Click on each client to open their overview page for more details
* Add clients manually or import them
* Control the client's association with an affiliate
***
### Requirements for Client Profile Creation
In order for the system to successfully create a client profile, the following parameter must be included in the postback you sent for conversions:
* `customer_id` - A client identifier like email address or your webstore's internal identifier string representing the client.
#### Postback Example
```
https://example-tracking.tracknow.info/postback?click_id=aed548f8-ca63-454c-a05a-a02726cc136f&campaign_id=1&order_id=11295&amount=150&customer_id=john.doe%40example.com
```
***
### Client Overview Screen
Navigate to **Performance** → **Clients** → Click on the **Client ID** of the relevant client
On this screen you'll be able to see the client's details, which affiliate the client is associated with and view a detailed list of this client's conversions.
***
### Lifetime Attribution
When a postback that includes the following parameters is sent:
* `customer_id={VALUE}`
* `new_customer=true`
The client will automatically be associated with the affiliate who referred him with lifetime attribution. However, in order to enable Lifetime commissions, you'll need to create a [lifetime-type payout](https://docs.tracknow.io/payouts/lifetime-payout).
{% hint style="info" %}
Postbacks for new clients that are sent without `new_customer=true` will still create a client profile but that client will not have a lifetime association with his referring affiliate.
{% endhint %}
***
### Affiliate Access
You can configure [affiliate permissions](https://docs.tracknow.io/affiliates/affiliate-permissions) based on whether you want them to have access to their referred clients list or not.
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