# Three PL -3PL

This configuration page features the option "Invoice Number Prefix" for Third-Party Logistics clients. A typical Invoice Prefix may be “INV-“(which will precede 3PL Client invoice numbers).

![P4 Warehouse Multi Client Email Configuration](https://2764542787-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MdqvtgkbuySRnxUkZY_%2F-Mj6vc6cBlqikQptqvXY%2F-Mj6w2dtNMbPdwKABQov%2Fimage.png?alt=media\&token=3e6f1252-ca0b-4fdc-ac44-a3d99c307a84)

{% hint style="info" %}
This screen is for configuring the email that your 3PL client will receive with their monthly invoice! 
{% endhint %}

{% hint style="warning" %}
This screen only functions IF you are using 3PL Invoicing.
{% endhint %}