# Licenses

The License option allows to view the options that are currently available on the active Maitre'D license. Additional modules, interfaces and components can be purchased through your Maitre'D Reseller or Sales Representative. Once purchased, they can be activated here.

![Screenshot - Installed Licenses](https://documentation.payfacto.com/POS/MaitreD/HelpModules/MainBO/assets/images/MDBack-OfficeSuite7/LicenseMgmt/02-LicenseOptions.gif)

**Serial Number**

Each Maitre'D installation has a unique serial number. You will need to provide this number when purchasing additional Maitre'D components or when calling the Help Desk.

**Commerce Name**

This is the commerce name that was assigned when the license was originally activated. It appears in the header of guest checks and receipts, as well as on the header of reports generated from the Report Center module.

![Button - Modify](https://documentation.payfacto.com/POS/MaitreD/HelpModules/MainBO/assets/images/MaitreDCommon/Buttons/MDButton-Modify.jpg)

Use the modify button to generate a site code and display the prompt that will allow you to enter an activation key for newly purchased Maitre'D components.

{% hint style="info" %}
NOTE: The activation key can only be generated by authorized Maitre'D Resellers using the Maitre'D Distributor Portal, or by Maitre'D Help Desk Specialists.
{% endhint %}

![Button - Print](https://documentation.payfacto.com/POS/MaitreD/HelpModules/MainBO/assets/images/MaitreDCommon/Buttons/MDButton-Print.jpg)

Use the Print button to print the license information on the default printer.

![Button - Close](https://documentation.payfacto.com/POS/MaitreD/HelpModules/MainBO/assets/images/MaitreDCommon/Buttons/MDButton-Close.jpg)

Use the Close button to close this screen and return to the Maitre'D Back-Office


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```
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